I have used Simplemining.net before ages ago when it was pretty new. It was great that somone was trying to provide something like this for free, etc....
but seriously, if you want something for Nvidia mining that kicks butt and works really well check out nvOC.
No offense to Tytanick - I appreciate his efforts but nvOC is by far the best solution for a "burn it to a USB stick" Nvidiia mining platform I've ever seen.
I think maybe Simplemining.net is better left to AMD miners as it was originallyy intended.