*** HOW TO INSTALL *** Extract the download archive directly into your MCP-directiory. It should create a folder "forge" within that directory, containing all extracted files. You should use freshly downloaded jars, add NOTHING to the jars, ModLoader is no longer needed. Both client and server are required and should be 100% clean. It comes with MCP 7.2a+, but if you do not have it, you need to install the FernFlower decompiler, you can download it at http://goo.gl/PnJHp. Extract fernflower.jar into your MCP's runtime/bin folder. Now just start the install.cmd/.sh, MCForge will install itself into the proper locations and copy all needed files, as well as modifying the needed baseclasses. Forge also includes a snapshot of the MCP mapings, this may not be the current version of the mapings. But you must use the provided mapings in order for the patch files to work together. The install scripts should take care of everything for you, so you should not need to run ANY MCP script before installing forge.