To continue in the traditiion of trackbacks, and since I can't seem to find an orginal post in my body, I thought that I would share this one with you. Jason Follas psted a solution on how to get SQL Client, running on Vista, to use different credentials when connecting to a SQL Server using Windows Authentication. Basically, there are a ton of posts out there, but this is the ONLY one that that I could find that had the solution. Here's the link to the full explantion: Making SQL Server Management Server work on Windows Vista
Here's the solution - Create a "runas.exe" shortcut with the following configuration:
C:\Windows\System32\runas.exe /netonly /user:domainx\myusername
"C:\Program Files\Microsoft SQL Server\90\Tools\Binn\VSShell\Common7\IDE\SqlWb.exe"
Works like a charm! Thank's Jason!