If you want to display the standard Pocket PC emulator without the regular skin, so just the screen itself is shown you can modify a couple of the settings files and skin bitmaps. For the default Pocket PC 2002 emulator you'll find the files here by default:-
C:\Program Files\Microsoft Visual Studio .NET 2003\CompactFrameworkSDK\ConnectionManager\Bin\Images\PocketPC\2002\1033
Make a backup before you alter anything!
Then replace the ppc2002.xml file with this one. Finally add this image to the folder which is the null skin, necessary in order that the emulator window is sized correctly. The finished result should look like this:-
