When I try to start a nested X by running "gdmflexiserver --xnest" I get the following message:
Cannot start new display
You do not seem to have authentication needed be for this operation. Perhaps your .Xauthority file in not set up correctly.
Well, I googled it and... I couldn't find anything to help me in my noobish situation.
And since LinuxQuestions is "where Linux users come for help"
I came for help (since I'm tired of searching...).
Help will be accepted with joy.