Microsoft Windows Vista� is a supported client platform starting version WP 6.0.1 (See the Information Center for the component limitations.)
I think that implies that clients can connect to the portal. I'm not sure if it means you can install the portal on Vista.
I found the easiest way to install Portal on Vista was to re-install Windows XP and then do the install. It's what
alot of people are doing.
I found that very little of my software, from Norton Anti-Virus, to WinZip, wouldn't install on Vista. I returned to XP.
-Cameron McKenzie