Best way to implement pinch to zoom?

I’m working on a game at the moment and eventually it’s going to need a way to zoom in and out using multitouch. In the pinch to zoom example ( http://developer.anscamobile.com/content/pinch-zoom-gesture ) it looks as though it is only meant to affect one image (background), but as mine has multiple objects I’m not really sure how to get it working with them all at the same time. When I started off I stuck them all into a display group just in case that would help when I came to facing this problem, but I’m not totally sure sticking the display group into that example would work straight off (I can’t build to device to test out just yet).

Anybody got any idea how best to do this? [import]uid: 30068 topic_id: 6462 reply_id: 306462[/import]