Help baking a cake in a rice cooker.

I just got a new rice cooker- Aroma's ARC-856- and it arrived just in time for me to make my sister's birthday cake, even allowing a couple of days for experimentation. This is a 6 cup cooker with no dedicated cake function, but it does have Aroma's version of "fuzzy logic" and multiple rice settings, as well as steam cook and 1 hour and 2 hour slow cook settings, and a delay timer. Has anyone ever made a cake in a similar type of cooker? If I use a mix, do I need to halve it? I don't want to blow up my brand new cooker on the first try! This is the rice cooker I got: