In OSX Snow Leopard is it possible to replace the "command & tab" app switching shortcut with the app switching that happens when you press tab in expose?

Sorry for the uninteresting question but it’s something I’d like to look into. I much prefer the way app switching works when done in expose, but I don’t want to have to activate expose then start switching through apps and their windows, so I’d like to know if I could use the command-tab shortcut to activate it, rather than the usual “app switching bar” that comes up.

Thanks!