How to connect two power supplys on picaxe board (so confused)

Ok, I'm more programmer than electronics wiz, and my day's of reading schematics have long since passed me by. So, does anyone have a good diagram (picture) on how to wire in a second power supply to a picaxe 28x1 board? I work good with pictures then I can de-construct it to a schematic and get a good grasp on things.

I know it can be done, and I just want to power my two track motors with one supply and my servo with a second. My current little 4.5 battery pack runs out of steam pretty quick powering everything. But can I just connect a 9 volt with a voltage regulator to power the motors only and the 4.5 to run the circuit and servo or is there a better way? I know you guys out there are way ahead of the curve with electronics and I can think of no one better to get a good answer from. I will post my first robot soon. Still tweaking the code a little. Thanks in advance!!!!