Unable to install Visual Studio 2005 on Windows Vista
I've got a brand-spanking new, clean install of Vista on my laptop, and I'm trying to install Visual Studio 2005 on it. Unfortunately, I'm not getting very far. The installer always displays the following dialog, complaining that I don't have XP SP 2 installed:

The only related info I've found from Microsoft is on the
VS2005 on Vista
issue list, which states that "Visual Studio products fail to install
in XP compatibility mode". However, I'm not selecting any
compatibility mode when running the install. I've run the
install as administrator, but no difference. I've tried
disabling UAC, but no difference. Does anyone know how to
get around this problem?
UPDATE - Although Scott Guthrie and crew
graciously offered to help track down the problem, I haven't
heard back from them after our initial exchange. However,
based on other recommendations that I found online, I copied
the DVD contents to my hard drive and successfully ran the
install from there. My guess is that when the installer is
run from the DVD it ends up running in XP compatibility mode
- but I have no idea why.