This does not add any compatabilities. It simply takes the files MCPatcher edits and puts them in a separate jar. You MUST patch your jar with FML or Forge, if you plan on using them.
This should work for any future or past versions of MCPatcher. As long as there are no drastic changes, such as using runtime patching, there should be no need for an update from me. In that scenario, there wouldn't be much use in this, though.
Source is also on Github
Start by clicking the "Select Jar" button. This will show a file selector you can use to select your MCPatcher created jar.
After selecting your jar, click "Repackage" to start the process. If all goes well, it will create a new jar in your mods folder and a message will pop up indicating this. It will be similar to this. A different message will appear if things goes wrong.
Right away you will be able to launch LiteLoader or Forge and MCPatcher will load with it. If you use LiteLoader, an entry will appear in the mods panel.
Licence and Modpacks
This project uses the GPL version 2.
This is a tool. Why do you want to include this in a modpack? If you're talking about the resulting jar this tool creates, you're asking the wrong person. Half of the code belongs to Prupe and the other half belongs to Mojang. Because of the way MCPatcher works, you cannot redistribute it without breaking Mojang's EULA.