You will first need to install "windows mobile 5 pocket PC SDK"
http://www.microsoft.com/downloads/d...DisplayLang=en
The install CF on the device.
http://www.microsoft.com/downloads/d...DisplayLang=en
Download both of these (make sure active sync is running) then install on your desktop. Active sync will do the rest
Once installed you will see Windows Mobile 5.0 Pocket PC in your project types in VS2005.