Here is a sneaky way that takes advantage of the fact that there is one access DB per file: no more, no less.

1. Get a list of your databases
2. Copy the first DB to temp.mdb
3. Create an ODBC to temp.mdb
4. Process temp.mdb as needed
5. Close the DB connect ($dbh->disconnect())
6. Delete the DB (unlink(temp.mdb))
7. Copy the next DB to temp.mdb
8. Loop....

Hope it helps!