I found some directions over at XDA that helped me find where it is.
http://forum.xda-developers.com/arch.../t-412613.html
here is the .RGU entry you need:
[HKEY_CLASSES_ROOT\CLSID\{783AC566-6E9F-41A4-8B5C-C5728C204E51}]
"SIPFlag2"="XXXXXXXXXXX"
obviously replace the XXXXXXXXXXX with your correct registration #.
Also, bear in mind that was found with SPB Mobile Shell 2.1.2. the specific reg key may change between versions (or not).
I've also placed my OEM of it on the ftp site. look in /Titan/Users/Pir8Man/