Re: Pen tool question in cs3
In the Pen Tool's options bar you'll see four squares. They're named Add to path area, Subtract from path area, Intersect path areas, and Exclude overlapping path areas. The reason you're having a problem with things being reversed is because when you made your path, the "Subtract from path area" option was selected. You should have selected the first box (Add to path area) instead

To correct the current problem try creating a selection from the path (Load path as a selection button) and then invert the selection (Select > Inverse) or use the keyboard shortcut Shift + Ctrl + I (Shift + Cmd + I for a Mac).
Hope this is helpful.