XV6900 is frozen at splash screen after changing default SIP. Please help!

[trance2002]

I was changing the default sip in the registry from the standard keyboard to PCMkeyboard and after a soft reset my phone is stuck at the Verizon splash screen. I can’t for the life of me see how that would have kept it from booting.

I changed HKEY_CURRENT_USER\ControlPanel\Sip\DefaultIM from {42429667-ae04-11d0-a4f8-00aa00a749b9} to {BB25F2EB-688C-4698-ADFC-F422A148AD4F}

I am running the new leaked Verizon WM 6.1 with customizations. I've given it a few soft resets to no avail as well as pulling the battery. How can I get this thing to boot up so I can at least switch the SIP back?