Vista - Copy Workgroup User Profile to new Domain User Profile

Hello all.

Here is my situation.

I had been on a domain "Test.com" on a workstation. The user name that I
used to log in was "Thomas.Nguyen". However, after having to rebuild the
domain and rejoining the workstation, the new user account, also
"Thomas.Nguyen," does not have the settings of the old. I know this would
happen.

Is there a way for me to copy the user settings (such as desktop, program
preferences) from the old user profile to the new. I have tried the SID
mapping using regedit but that did not get me anywhere (or I didn't do it
correctly).

This is the file structure that I have:

C:\Users\Thomas.Nguyen (old profile)
C:\Users\Thomas.Nguyen.Test (new profile)

I wanted to just copy and paste the contents from the old to the new but
have read about reprecussions.

Is there any easier way to do this or at least a more effective way that
won't make me lose all my settings from the old profile?

Thanks in advance for your help.

Network Guru / Not Vista Guru Yet