I think that minecraft should have a mods folder; just like texture packs. You put the mods in the folder and they work automatically. You can use any mod. It will be easier than deleting meta.inf and all the .jar stuff. It would be amazing if we could do that. All the file deleting and adding would be gone. Life would be much easier for modders too. They could just put in the file and test it out. When you are done or want to play vanilla, just pull the mod out of the folder and get a new one or just leave the folder alone.