There are no such things as "stupid" questions. However if you think your question is a bit stupid, then this is the right place for you to post it. Please stick to easy to-the-point questions that you feel people can answer fast. For long and complicated questions prefer the other forums within the support section. Before you post please read how to get help
If you are having difficulty enabling Compiz, you could try opening "Desktop Settings" in the Control Panel and enabling Gnome compositing in the Windows tab. I have found that this works as well as Compiz for Docky and AWN dock and it is much less of a resource hog.
FYI: Desktop Effects are NOT entirely necessary for compositing: Open the GNOME Configuration Editor; press Alt-F2 to open the Run Application dialog and type gconf-editor. Click Run. Navigate to Apps->metacity->general. Check the compositing_manager box, and Metacity will immediately restart with compositing!