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Open this by holding windows sign + r
https://www.facebook...=468&height=468
It brings you here
https://www.facebook...=468&height=468
Go into versions folder, copy and paste 1.6.4 file into the versions folder
https://www.facebook...=468&height=468
Name it like 1.6.4 Mods or whatever
open the folder u just renamed and then u see these 2 files
https://www.facebook...=468&height=468
rename them 1.6.4 Mods with same case letters everything the same
When you open up JSON file with notepad, you get this
https://www.facebook...=468&height=468
In between quotes, put 1.6.4 Mods
Same case letters
Erase what was in it before
Save it and exit
then go back to the 1.6.4 Mods folder u just made
Rename the JAR file
open it with winzip or winrar
Open up JAR and u get this
https://www.facebook...=468&height=468
Delete the Meta Inf Folder
Then download optifine
Open the optifine file with winrar or winzip
Drag optifine files into your minecraft jar
SAVE
exit
when you open up minecraft
Go to profile editor
at the top
before you click play
look for 1.6.4 Mods
select that
then click play
OPTIFINE DOWNLOAD:
http://www.minecraft...-and-much-more/