you can still change the skins in Prime Contact. The directory has moved to \windows\skins. From there I think you can use the config tool to select whichever skin you want. However, Prime Contact is a commercial app now so you cant use the dial feature unless you register it.
If you installed PocketCM at the same time, then Prime Contact overwrote the reg and has hidden PocketCM. If you want to use PocketCM, change this reg:
Code:
[HKEY_LOCAL_MACHINE\Software\Microsoft\Shell\Rai\:MSCONTACTS]
"1"="\"\\Windows\\pocketcm.exe\""
Actually, if you edit it on the phone it will look like this
Code:
"1"="\Windows\pocketcm.exe"