Has anyone done a silent unattended install of Visual Studio 2005 yet?

I tried the techniques I used for doing it with Visual Studio 2003 and that doesn’t seem to work anymore. 

When you run:
Setup.exe  /CreateUnattend c:\unattended.ini
it allows you to create an unattended ini file to use.  That part still works.

However, now when I run:
Setup.exe /UnattendFile c:\unattended.ini
I runs for a few seconds and then exits with no installation.

If anyone has better luck please post your comments / experiences!