I needed to use a shared printer so I changed from the domain I used to be in to a workgroup. However now that I try to go back to my domain, I can't. The problem is, my primary user profile is the one under that domain. So all my preferences and other settings have been lost and I have to go through c drive, documents and settings, etc.. I know I can't get back into the domain now, but is there anyway to copy my user settings so I can log into my old user account?

You need to talk to your network admins about this. They should have a program that will allow you to log back into the domain.