I'm running Ubuntu 6.06...
You can edit inittab in that version to start you at Run Level 3, instead of the default graphic run level. The entry you're looking for is:
Quote:
# The default runlevel.
id:2:initdefault:
|
Change "2" to "3". This will boot Ubuntu into RL 3 with no X running. You'll have to "startx" to get into the graphic environment.
I think this should work for you.