psx--->psx save help

i am playin final fantasy 8 on psp at the moment at the end of disk 1. n i have disk 2 on my memory stick i have tried loading the save from disk 1 on disk 2 but will not work. the 2 eboots have come from different places therefore i assume the save codes:confused: are wrong if this could b so how can i correct this? and also is there a way to play my psp save on my psx oringinal game and visa versa? PLZZZZZZ HELP THANK YOU IN ADVANCE :D :D :D :D :D :cool: :cool: :cool: :cool: :cool: :thumbup: