I hope that gets you started, freebit13.  If it's not obvious, you can use different values other than "50/50/0" for the quota -- anything like "25/25/50" works too.  And it doesn't even need to add up to 100%; I just do that because it's easier for my feeble brain to keep up with the math.  (Again, see the cgminer README file for explicit instructions on how this is supposed to be done -- but if you're anything like me, what you *really* needed was an example showing you a version that actually works...so here you go!)  Good luck and let me know if you run into problems; I cut and pasted most of the above, so I don't *think* there are any typos, but obviously you should back up your old config file just in case.  

Hope that helps!