....
And how to modify sweepstakecoin.conf to mine in solo?
....
It's the same as solo mine any other coin.
An example:
running wallet with .conf:
server=1
listen=1
daemon=1
rpcuser=YOUR_USERNAME
rpcpassword=YOUR_PASSWORD
rpcallowip=xxx.xxx.xxx.xxx ::(IP-address of your mining rig in the same local network with your wallet PC, if you ran wallet on mining rig PC just use 127.0.0.1)
::......
rpcport=17571
port=17570
Do not forget to add rpcport to Windows firewall exclusion