Windows 7: Running VBS script at boot

I want to run a small VBS script on startup, before the Windows selection screen appears. So I found out about the Startup scripts in Group Policy and tried adding the VBS script, or a batch file that calls cscript with the VBS file to get the output to console. However, neither solution actually displays anything during startup, at any point until the logon screen.

It should be noted that the script simply prints out the drive letters used. So what could be wrong?

Until logon, there is no place to output anything. What you really need (I think) is to run the vbs script as a Start Menu item. That should work.