I'm trying out the windows version with a GTX 670 and it doesn't seem to be working

I can confirm that I've installed CUDA dev software 5.0
I also have updated drivers including cudart32_50_35.dll

When clicking on the rpcminer-mod-cuda.exe file the black cmd screen comes up and an error window immediately says "rpcminer-mod-cuda.exe has stopped working"

On the cmd window in the background it says

Client will start 1 miner threads
Work will be refreshed every 4000 ms
1 GPU CUDA device(s) found
:54[CUDA] Error: invalid device ordinal
Error:invalid device ordinal

When I run the debugger it tells me there is a Run-Time Check Failure #0 - The value of ESP was not properly saved across a function call.  This is usually the result of calling a function declared with one calling convention with a function pointer declared with a different calling convention

To be honest I wasn't sure where exactly to extract the zip files, or how to make a file that alters how the executable runs...  Any help will be greatly appreciated.  Post your address and I'll tip you my first bitcent or so