BTW, thanks Craig.
I'll just add a tidbit in here as well. If you already didn't know Mac OS comes in with an advanced but easy way of taking screen shots. It saves all the pictures to the desktop in .png
It will also save it as Picture 1, Picture 2 and so on. However, if you for some reason delete Picture 1, and leave Picture 2-5...when you take a new picture, it will save it as whatever the earliest number possible is (i.e. in this case it would save the new picture as Picture 1)
1) CMND (Apple Button) + Shift + 3
Takes a picture of the entire screen, no matter what is there.
2) CMND + Shift + 4
Allows you to choose exactly what you want by turning the mouse into a cross that tells you via numbers the coordinates of where you are pointing at that particular time. When you select what you want and let go of the mouse, it will look like this:
3) CMND + Shift + 4, then Spacebar.
Great feature. Hitting spacebar will allow you to take pictures of specific windows. It's great for when you want to show just what window you are working in. This is what it looks like when you hover over different windows, and what that shot will look like:
mg: 
