GullibleGooo, typing "setgenerate true" in the help > debug window > console will start the miner on all current cpu cores/threads. to specify a number of threads type "setgenerate true x" where x is the number of threads youd like to run.
Thanks a lot guys! I had no idea one could mine from the wallet

In the unlikely event that someone else is in need of this information, I include more thorough instructions from xpm123.com/howtomining.html:
1. Open your wallet, waiting for synchronizing with network over.
2. From Help-Debug Window-Console, use the command setgenerate true.
For example: setgenerate true 3
3 means that mining is limited to 3 processors. If you have a CPU with 4 cores, one will be idle.
-1 means unlimited. Mining will occupy 100% CPU.
3. Use getmininginfo to check your mining state.
Notice: hashespersec means the speed of computing primes, but it does not show all of the mining efficiency.