Login as root and at the command prompt type 'Xconfigurator' (Without the quotes )
If you are stuck automatically booting into X then just hit control+option+F2 and that will switch u to another Virtual terminal. Login as root, run Xconfigurator, then when it's finished type 'init 3' (to shutdown the X server) when init 3 is done type 'init 5' (that will start the xserver again) that will put you into the graphical login screen. From there you can log in as you. Don't forget to switch back to the virtual terminal and logout (you can switch between virtual terminals at any time, the X terminal is on tty7 (Control+Option+F7) once you logout you can go back to x by pressing those keys.)
Hope that helps...
-Gixer
1 PPC G3 Laptop: $2000
1 PPC 8100 Web Server: $500
1 Intel Celeron 1.8GHz: $600
2 PPC G4 Web Servers: $6000
Being able to run the same OS on all of them.....Priceless
The Power Of Linux