i have a Nvidia GTX 560 SSC, can it be used with this gpu miner ?
Probably yes. This is an OpenCL miner, so it works on virtually any GPU (And also with some CPUs). Just try it out and report the results.
well i just opened, and it's stuck at "initializing device", i left it for a while hoping it would start sometime but it's still there, any idea why ?
The code for the hashes is quite complex, so it takes a lot of time to compile on some cards (specially AMD). I had to wait up to 20 minutes on one of the test machines...