[CentOS] Insert the second CD of an install

Using CentOS 5.5 x86_64.

I am trying to install software that comes on two discs. I can start the
install just fine, but when it comes to taking out the first disc and
putting in the second, the system won't let me eject it.

I remember reading something on the internet once about something needing to
be enabled to allow this to work, but I can't find it now. Does anybody have
a clue as to what I might be looking for?

(Yes, the work around is to just mount both ISOs and not use real discs at
all, but as administrator I understand that process and my users won't.
However, they are familiar with the process of inserting disks.)

Thanks!

---
Mike VanHorn
Senior Computer Systems Administrator 
College of Engineering and Computer Science
Wright State University
265 Russ Engineering Center
937-775-5157
michael.vanhorn at wright.edu
RSS: http://www.engineering.wright.edu/~mvanhorn/MikeVanHorn'sNewsFeed.xml
http://www.engineering.wright.edu/~mvanhorn/