Any way to switch a C2075 into TCC under 32 bit windows 7?

I just updated to CUDA 5 with latest drivers etc and everything fell apart. My system has a crummy little VGA card for display and a C2075 with no monitor for development with MSVC2010. Now CUDA can’t find the Tesla, I’m thinking it needs to be switched to TCC mode but nvidia-smi doesn’t ship with the 32 bit drivers. I have some vague memory of a registry hack back when I first installed this thing, does anybody have a hint? Thanks.