For those of you that want to develop for SharePoint on Vista or XP and wish to install VSeWSS (1.2 is the latest available here). I found a quick registry hack on Ahmed’s blog that you can apply.  All you need to do is add this registry value: [HKEY_LOCAL_MACHINESOFTWAREMicrosoftShared ToolsWeb Server Extensions12.0] “SharePoint”=”Installed” and then run the installer.  I did it on Vista with VS 2008 and it worked great!