Question on installing the SQL Server 2005 Developer Edition on the Windows Vista

I cannot find any specific info on the support of SQL server 2005 developer edition on different Windows Vista. Does anyone have any experience? TIAjust refer, http://msdn2.microsoft.com/en-us/library/ms143506.aspx|||My experience is very problematical. I've tried installing it several times on my new Vista 64 Ultimate machine, and each time I wind up with only the Express edition, not the full/Enterprise edition as I was able to do on my prior XP Professional machine. Being limited to Express is a problem, since the test database I have from my client exceeds the 4GB threshold that the Express Edition imposes. If anyone has had better luck, or knows hoow to do this better, I'd love to hear about it.