After the pain of VS 2005 SP1 (which killed my machine, as a matter of fact), I decided to install the SP1 beta for VS2008 on a clean VM. That VM is a simple install of the OS + VS 2008, that is all.
Here is the result of installing VS 2008 SP1 Beta. I have no idea what happened, at one point it was installing, now it is rolling back.
I suppose I could try to figure out what is going on, by hunting in the logs and trying the cargo cult approaches.
But I have a simpler solution, just avoid the whole thing. Is it too much to ask that the installer will work?