this may help:
http://www.microsoft.com/downloads/details.aspx?FamilyId=2E861E76-5D89-450A-B977-980A9841111E&displaylang=endepends on what you are providing the customers and what they have...
for sure I would get any V2 stuff over to 2003 format as V2 is WAY WAY old.....
you may or may not have problems to fix, some things that were done in v2 were phased out by 2003
some macros and vba code may need to be edited if you have any in the access files.
also you may want to look at the ADK -- Access developer Kit if you can get a copy of the 2003 version then you can ship a runtime of 2003 with your app such that the users do not need to have access at all.
you make your package run like a regualr app and they can't mess with the forms and stuff.