You would do it the same as pool mining except you would start your wallet with the -server flag. Then mine to localhost with rpc user name and rpc password that you set in your darkcoin.conf file.
solomining.com is nice... just found out this post, and tried it... works like a charm. now we wait for first payment
i dont quite understand what are those different difficulties settings...
if i am mining on VPS where cpu gives around 120Khash... which setting is optimal?