Being it is Access, you could copy the database file and rename the columns in the copy. This way you get quick access to the production data without altering the production database.
Can you export the tables to CSV and import to your new database from there? I've found this is the fastest way to perform ad-hoc queries against an Access database at work. I dump all of the tables to CSV and import them into PostgreSQL. If your target database can't import from CSV it would be simple to write such a utility in perl.