[Rhapsody]

Why wouldnt you just make a "The 1.7.10 ModPack" Server, quite possibly the best modpack in minecraft.

what is the main IguanaTinkerTweaks to edit

You should re-read the post, specifically the 'How do I install Feed the Beast?' section.

After it installs, go to "C:\Users\%username%\Documents\Curse\Minecraft\Instances\FTB Infinity Evolved\config\IguanaTinkerTweaks", open up main.cfg, and replace the contents with this. If you haven't launched the game yet, these folders and files will not exist, so you should either create them, or start up the game, close it, then come back to this. Failing to do so will make it so that you can't use vanilla tools to mine.