Microsoft Access 2007 converted from 2003 - split database compatibility issues with Windows 7

I have a small Access database that is used by a handful of people in my office. It was intially designed as a Access 2003 .mdb file, and all tables were stored locally w/in the mdb file.  It was working fine, but I needed to upgrade because some users were moving to Windows 7 which seems to be incompatible with Access 2003 versions.

So I converted it to Access 2007 accdb, and while I was doing that I split the database.  Now, the front end is an accdb file, and the backend database was split (automatically by the Access wizard) into an Access 2003 mdb backend.

For those of us using Windows XP - we don't have any problem with the Access 2007 front end/Access 2003 backend.  However, WIndows 7 users are not able to use the database because the backend is Access 2003.

Can you tell me the best/safest way to upgrade the backend to Access 2007 and still have the front end link to the new version of the tables?  

If I open the mdb backend and convert it to accdb, will I simply need to run a "linked table manager" from the front end to point the tables to the new accdb backend version?  

Thanks for your help.