Thankyou so much for your help

So does that mean if we wanted to take indoor shots and they do not allow flashes,just use a sports mode?I am still overwhelmed by using ISO's etc etc!Plus the manual really does not help people who are learning!lol
Unless you want to get into the manual modes, using Sports mode is probably the best solution for low light. You will get grainy pictures (lots of noise) because it always bumps up the ISO, so you'll need Noise Reduction software (the free version of Imagenomic's Noiseware is great!).
In general, there are really only 4 camera settings that you need to concern yourself with.
Three of them make up the "exposure": aperture, shutter speed, ISO. Aperture is the size of the hole that lets the light in; lower number = bigger hole = more light. Shutter speed is, of course, how long the shutter is open; longer times = more light = more motion blur. ISO is how sensitive the sensor is to light; high numbers = more sensitive = more noise.
You can creatively combine these three settings in numerous ways to get a "correct" exposure. I'd suggest you check out the tutorials on
www.GoingManual.com ... it will explain all of this really well!
The other setting you should be familiar with is the Metering Mode; the setting that guides how the camera's light meter reads the image -- you get Evaluative, Center-weighted and Spot. The light meter's readings are used by the camera to make setting choices when you're in the P, Av and Tv modes (and, of course, it's doing it completely behind-the-scenes in Auto/Scene modes), and it can give you some guidance when shooting in M.
In general, Evaluative is best for "normal" situations. Center-weighted or Spot are better when the light starts to get low. Spot metering works best with Spotlit subjects; so it's easy to remember, too.