Aperture is the size of the opening inside the lens that decides how much light is let in. An aperture of 2.8 lets in alot of light and has a WIDE opening, while an aperture of 22 lets in a SMALL amount of light, and has a really small opening.
Shutter speed is obvious. Faster shutter speeds are used to "stop" motion.
ISO is the camera's sensitivity to light. For example, an image taken at iso 100 is barely sensitive to light, and is often used in BRIGHT situations. An iso of 1600 is very sensitive to light, and is used when there is very LITTLE light.
So, ideally, you would want an aperture of 2.8 or wider, an iso of prob 1000, and a shutter speed of 1/125 or faster.
Now, i am not sure what these p&s's can do. If it is possible to use a manual mode, i would try that. For me, using manual is a whole lot of guess and check. "set it this way.. hmm. thats too bright." so then i speed up accordingly, whether it be aperture or reduce the iso sensitivity.
I hope that wasnt confusing. haha