I made a modded version and i changed the name of the folder, jar, json file, and the id. Then i put in the class files for Better Sprint Mod and deleted META-INF. I ran it in minecraft but it would not start because it is trying to download an update but the url does not exist.
[20:18:31 WARN]: Couldn't download https://s3.amazonaws.com/Minecraft.Download/versions/bettersprint/bettersprint.jar for job 'Version & Libraries'
java.lang.RuntimeException: Server responded with 403
at net.minecraft.launcher.updater.download.EtagDownloadable.download(EtagDownloadable.java:43) ~[launcher.jar:?]
at net.minecraft.launcher.updater.download.DownloadJob.popAndDownload(DownloadJob.java:108) [launcher.jar:?]
at net.minecraft.launcher.updater.download.DownloadJob.access$000(DownloadJob.java:12) [launcher.jar:?]
at net.minecraft.launcher.updater.download.DownloadJob$1.run(DownloadJob.java:89) [launcher.jar:?]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:439) [?:1.6.0_65]
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303) [?:1.6.0_65]
at java.util.concurrent.FutureTask.run(FutureTask.java:138) [?:1.6.0_65]
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895) [?:1.6.0_65]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918) [?:1.6.0_65]
at java.lang.Thread.run(Thread.java:695) [?:1.6.0_65]
[20:18:31 INFO]: Attempting to download /Users/user/Library/Application Support/minecraft/versions/bettersprint/bettersprint.jar for job 'Version & Libraries'... (try 1)
[20:18:32 WARN]: Couldn't download https://s3.amazonaws.com/Minecraft.Download/versions/bettersprint/bettersprint.jar for job 'Version & Libraries'
java.lang.RuntimeException: Server responded with 403
at net.minecraft.launcher.updater.download.EtagDownloadable.download(EtagDownloadable.java:43) ~[launcher.jar:?]
at net.minecraft.launcher.updater.download.DownloadJob.popAndDownload(DownloadJob.java:108) [launcher.jar:?]
at net.minecraft.launcher.updater.download.DownloadJob.access$000(DownloadJob.java:12) [launcher.jar:?]
at net.minecraft.launcher.updater.download.DownloadJob$1.run(DownloadJob.java:89) [launcher.jar:?]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:439) [?:1.6.0_65]
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303) [?:1.6.0_65]
at java.util.concurrent.FutureTask.run(FutureTask.java:138) [?:1.6.0_65]
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895) [?:1.6.0_65]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918) [?:1.6.0_65]
at java.lang.Thread.run(Thread.java:695) [?:1.6.0_65]
[20:18:32 INFO]: Attempting to download /Users/user/Library/Application Support/minecraft/versions/bettersprint/bettersprint.jar for job 'Version & Libraries'... (try 2)
[20:18:32 WARN]: Couldn't download https://s3.amazonaws.com/Minecraft.Download/versions/bettersprint/bettersprint.jar for job 'Version & Libraries'
java.lang.RuntimeException: Server responded with 403
at net.minecraft.launcher.updater.download.EtagDownloadable.download(EtagDownloadable.java:43) ~[launcher.jar:?]
at net.minecraft.launcher.updater.download.DownloadJob.popAndDownload(DownloadJob.java:108) [launcher.jar:?]
at net.minecraft.launcher.updater.download.DownloadJob.access$000(DownloadJob.java:12) [launcher.jar:?]
at net.minecraft.launcher.updater.download.DownloadJob$1.run(DownloadJob.java:89) [launcher.jar:?]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:439) [?:1.6.0_65]
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303) [?:1.6.0_65]
at java.util.concurrent.FutureTask.run(FutureTask.java:138) [?:1.6.0_65]
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895) [?:1.6.0_65]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918) [?:1.6.0_65]
at java.lang.Thread.run(Thread.java:695) [?:1.6.0_65]
[20:18:32 INFO]: Attempting to download /Users/user/Library/Application Support/minecraft/versions/bettersprint/bettersprint.jar for job 'Version & Libraries'... (try 3)
[20:18:32 WARN]: Couldn't download https://s3.amazonaws.com/Minecraft.Download/versions/bettersprint/bettersprint.jar for job 'Version & Libraries'
java.lang.RuntimeException: Server responded with 403
at net.minecraft.launcher.updater.download.EtagDownloadable.download(EtagDownloadable.java:43) ~[launcher.jar:?]
at net.minecraft.launcher.updater.download.DownloadJob.popAndDownload(DownloadJob.java:108) [launcher.jar:?]
at net.minecraft.launcher.updater.download.DownloadJob.access$000(DownloadJob.java:12) [launcher.jar:?]
at net.minecraft.launcher.updater.download.DownloadJob$1.run(DownloadJob.java:89) [launcher.jar:?]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:439) [?:1.6.0_65]
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303) [?:1.6.0_65]
at java.util.concurrent.FutureTask.run(FutureTask.java:138) [?:1.6.0_65]
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895) [?:1.6.0_65]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918) [?:1.6.0_65]
at java.lang.Thread.run(Thread.java:695) [?:1.6.0_65]
[20:18:32 INFO]: Attempting to download /Users/user/Library/Application Support/minecraft/versions/bettersprint/bettersprint.jar for job 'Version & Libraries'... (try 4)
[20:18:32 WARN]: Couldn't download https://s3.amazonaws.com/Minecraft.Download/versions/bettersprint/bettersprint.jar for job 'Version & Libraries'
java.lang.RuntimeException: Server responded with 403
at net.minecraft.launcher.updater.download.EtagDownloadable.download(EtagDownloadable.java:43) ~[launcher.jar:?]
at net.minecraft.launcher.updater.download.DownloadJob.popAndDownload(DownloadJob.java:108) [launcher.jar:?]
at net.minecraft.launcher.updater.download.DownloadJob.access$000(DownloadJob.java:12) [launcher.jar:?]
at net.minecraft.launcher.updater.download.DownloadJob$1.run(DownloadJob.java:89) [launcher.jar:?]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:439) [?:1.6.0_65]
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303) [?:1.6.0_65]
at java.util.concurrent.FutureTask.run(FutureTask.java:138) [?:1.6.0_65]
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895) [?:1.6.0_65]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918) [?:1.6.0_65]
at java.lang.Thread.run(Thread.java:695) [?:1.6.0_65]
[20:18:32 INFO]: Attempting to download /Users/user/Library/Application Support/minecraft/versions/bettersprint/bettersprint.jar for job 'Version & Libraries'... (try 5)
[20:18:32 WARN]: Couldn't download https://s3.amazonaws.com/Minecraft.Download/versions/bettersprint/bettersprint.jar for job 'Version & Libraries'
java.lang.RuntimeException: Server responded with 403
at net.minecraft.launcher.updater.download.EtagDownloadable.download(EtagDownloadable.java:43) ~[launcher.jar:?]
at net.minecraft.launcher.updater.download.DownloadJob.popAndDownload(DownloadJob.java:108) [launcher.jar:?]
at net.minecraft.launcher.updater.download.DownloadJob.access$000(DownloadJob.java:12) [launcher.jar:?]
at net.minecraft.launcher.updater.download.DownloadJob$1.run(DownloadJob.java:89) [launcher.jar:?]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:439) [?:1.6.0_65]
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303) [?:1.6.0_65]
at java.util.concurrent.FutureTask.run(FutureTask.java:138) [?:1.6.0_65]
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895) [?:1.6.0_65]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918) [?:1.6.0_65]
at java.lang.Thread.run(Thread.java:695) [?:1.6.0_65]
[20:18:32 ERROR]: Gave up trying to download https://s3.amazonaws.com/Minecraft.Download/versions/bettersprint/bettersprint.jar for job 'Version & Libraries'
[20:18:32 ERROR]: Job 'Version & Libraries' finished with 1 failure(s)! (took 0:00:03.006)
Cannot run modded version