GOG provides two key sheets one labeled as "EECH keyguide 08-2007 2.9". I am using the EECH modded with "allmods" I was wondering if those have different controls from the vanilla EECH. Which key sheet should I use "keyguide.pdf" or "keyguide2.pdf"?

Well, a little late, but you need to use the one in the drive:\installpath\cohokum folder (eech_keyguide_3.pdf)