[AccessD] Converting Access97 to 2000 to XP

Hey All
Just a quick, probably dumb question.
Are there major differences between Access2000 and AccessXP.
I have converted an Access97.mdb application to Access2000 and 
everything runs/works fine.
Sent the Access97.mdb to a friend (not a programmer or developer) to 
convert to AccessXP and he is getting major errors  when trying to run 
the program.
My other option at this time is just to create a standalone self 
installing version of the Access97 program.

Thanks