Here is a quick tip for early adaptors of Adobe CS3. If you want to install both CS2 and CS3 on the same Mac, make sure you install Adobe CS2 first. If Adobe CS3 is already installed, the CS2 installer will gray out Acrobat, Illustrator and InDesign, thinking those applications are already installed.
The simple, but frustrating solution is to uninstall CS3 and reinstall CS2 first.