PLEASE HELP!

First i modded dune and it was messed up so i went to mod turf i applyed the sppf and use cmr 2 then ftp it then i played it then i resighned the map again using cmr 1 instead then ftp then when i put it in and it said (original xbox game has a problem and cant continue) i took xsata off and put my normal HDD just on and tryed to play and it didnt work so then i got my bros halo 2 disc and tryed to play it with just my HDD on and it didnt work so then i got his HDD and put it on my 360 and it did work so then i put my HDD on his 360 and played halo 2 and it worked i can play any other game xbox or xbox 360 it just wont let me play halo 2 on my 360 any help please?HELP!!!!!!!!!!!