I reckon you should go for EECH+mods. Try looking on Ebay for a copy as thats where I got mine. If you mosey on over to SimHQ, they have a section dedicated to EECH/EECH2. You can find a lot more info over there about patching to the latest version (1.10.2) as well as the superb new Apache AH64-D Longbow cockpit made by Arneh. For all the neccessary info and mods, look here:
http://www.simhq.com/forum/ubbthreads.php/ubb/showflat/Number/2366722#Post2366722
Good luck with it.