Or do I need to go into the .JAR and extract them myself?
Yeah, this. It's the easiest/most self sufficient way of doing things.
extract the entire .jar of the version you want to a folder
go in that folder, find and select the assets folder. Invert your selection and delete
now you can move this folder to a better location, like your documents folder for easier access/reference later
If your pack is highly complete (not too outdated and has many of the types of files related to what you want to add), you can forgo the unzipping part and just peek in the jar to get the names you need, copy one of your other files in a similar folder, and then rename to the proper name and retexture (this is the method I usually use).
Are you back?
Rollback Post to RevisionRollBack
"I'm an outsider by choice, but not truly.
It’s the unpleasantness of the system that keeps me out.
I’d rather be in, in a good system. That’s where my discontent comes from:
being forced to choose to stay outside.
My advice: Just keep movin’ straight ahead.
Every now and then you find yourself in a different place."