I found an useful Registryscript to start an ASP.NET Development Web Server from the Explorer.

http://weblogs.asp.net/rmclaws/archive/2005/10/25/428422.aspx

But there are two locations

“C:\Windows\Microsoft.NET\Framework\v2.0.50727\” and
“C:\Programme\Gemeinsame Dateien\Microsoft Shared\DevServer\9.0\”

Here is my Registry “Script”:

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\\SOFTWARE\\Classes\\Folder\\shell\\VS2005 WebServer]
@="ASP.NET 2.0 Web Server Here"

[HKEY_LOCAL_MACHINE\\SOFTWARE\\Classes\\Folder\\shell\\VS2005 WebServer\\command]
# @="C:\\\\Windows\\\\Microsoft.NET\\\\Framework\\\\v2.0.50727\\\\Webdev.WebServer.exe /port:8080 /path:\"%1\""
@="C:\\\\Programme\\\\Gemeinsame Dateien\\\\Microsoft Shared\\\\DevServer\\\\9.0\\\\WebDev.WebServer.EXE /port:8080 /path:\"%1\""