So I want to make an addon involving two different mods. I decompilied the mods (so all the files in them are .java files) and put them in my forge folder, so that Eclipse will see them. However, most of the files (not all) have errors now involving different method names (for example, the blocks in one of the mods use func_149647_a, but the blocks in the MC source that I have use method name "setCreativeTab()". So because the two names are different every single block class in that mod gives "method not found" errors.
How can I fix this? I guess I could go through every class but that would be extremely tedious, there has to be another way to have Eclipse recognize "func_149647_a" and every other one of those. Probably did something wrong with MCP...