So this is a non forge question. I want to change up just a little bit of minecraft code to create a simple mod with out having to learn to use forge. The problem is after I create my mod I do the stuff to get the modded files. Then I go to the minecraft jar and put the modded files into the jar file. But then when I run minecraft the jar file just gets re-downloaded. I don't understand it. I renamed the the folder, jar file, jason file, and opened the jason file and changed 1.9.4 to the new name and I also deleted the META-INF folder from the jar file. If I were to create and install a mod into a server.jar every thing would work fine, but if I try to mod the client it just re-downloads the jar file and I can't use my mod. How do I install the mod so it can work?