I don't agree.  With 200 kh/s, (achievable with GPU mining), you would expect to hit a block around once every 5 days (at least according to the litecoin calculator).  If 10 people do that, it would take 12 hours per block.

If you have a nVidia graphics card, then you should search for cuda miner.

The command line is:

cudaminer.exe -o localhost:9223 -O :

You also need to add this to your craftcoin.conf file