NeoScrypt GPU miners are available for half a year or so, but solo mining support is broken in SGminer. The last time I tested it in CGminer 3.7.8, it worked.
I'm not sure what difficulty SGminer displays. You better ask its developer. My GPU miner isn't ready for release yet.
Thanks. I downloaded and tried cgminer but it gives me less than half the hash rate as sgminer. For some reason if I set threads to 2 cgminer crashes. I will continue to play with it. In the meantime I can mine a pool with sgminer.
The NeoScrypt OpenCL kernel in CGminer is old. Pull the one from SGminer and rename.
Yes, rename it to neoscrypt140909.cl