Access 2007 Install Broke Access 2000 Runtime

I have an old Polaroid ID Cardmaker program that uses an Access 2000 Runtime
to work. After installing Office 2007 Pro Plus I found that the cardmaker
program would no longer work. The error is 2501 The OpenForm operation was
cancelled. If I try to open the mdb file the error is "You do not have the
necessary permissions to use the ........MDB object."

If I use the Polaroid installation CD and reinstall the Access 2000 runtime
the application will work but I can no longer open Access 2007 without it
going through a reconfiguration. Once that happens the cardmaker app won't
work. Am I stuck in DLL hell or is there a way that both versions of Access
can be happy?

Thanks