For solo gpu mining put this in your config file (%appdata%\Ferretcoin\ferretcoin.conf on Windows and ~/.ferretcoin/ferretcoin.conf on Linux, create the file if it doesn't exist yet):


Then run your wallet again.

With cgminer for example invoke it as: cgminer.exe --scrypt -o http://127.0.0.1:33032 -u username -p yourpassword (add hardware specific parameters matching your cards to reach your max hashrate! You can find a comprehensive list of cards with good parameter choices in the config notes here: http://litecoin.info/Mining_Hardware_Comparison)