When I go to C:\Users\(user)\AppData\Roaming\.minecraft\versions\1.6.2, I see my .jar file but when I try to open it, it does nothing. So how do I open my .jar file so I can mod it? I also know that if I extract the files my minecraft crashes. Why is that? How can I open it so I can mod it?

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1 Answer

you use any package manager that can handle a zip, because a jar is a zip with a different extension, the jar is signed though so you'll need to remove the files in META-INF when you repackage

however I suggest you look at forge; this is an api to make modding easier and allows compatibility between mods

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