GNOME power management pref

[Adam D]

Apple Powerbook G4 15' Ti

After some looking around on the system, I have come to see that I can only put the system to sleep under GDM or anything else using ppbuttonsd but when logged into a GNOME session the GNOME power management functions take over and I can't seem to use:  /usr/sbin/pmi action sleep.

Can I change the GNOME power management to reflect this so I can lock the screen and put the system asleep?

-Adam