Create a DVD as a non-Administrator

I recently added a Samsung DVD RW drive to a Windows XP SP3 Professional
computer in our work environment. We do not allow anyone to run as local
admins.

On this computer, the drive shows up fine when logged in as administrator.
3 different software packages recognize it fine and can record DVDs to it
(Sony DVD Architect, Nero 7, and InfraRecorder). However, once a non-admin
logs in, all three software packages (and Windows itself) only recognize the
drive as a CD-RW.

I am racking my brains over this one. I've searched countless newsgroups
and support sites, but can't find anything. (It's probably something stupid
in my search terms - I know I can't be the only one with this problem!)

Any ideas?
Thanks