I install the Asp.NET 2.0 framework on a WinXp pro box. When I bring up the property page of a virtual directory, for some reason, I can't see the ASP.NET tab where you can config the asp.net version to either 1.1 or 2.0

So I have to use the ASP.NET IIS Registration Tool (Aspnet_regiis.exe) to config my virtual directory to use asp.net 2.0 framework!
The MSDN article is a pretty good help on this issue:
http://msdn2.microsoft.com/en-us/library/k6h9cz8h.aspx