SciLor’s LeoCameraAnyKey is a tool that allows you to run the camera/camcoder function of your devicem but you can now use the volume keys of the HTC HD2 aka. Leo to make your photo/video. It may work on other devices on many keys. Now you may use it just to zoom in and out.#

Changes:

v0.2.5 (2010-06-05)
-Feature: Tap2Capture & Hold2Zoom
-Feature: HVGA added (HTC HD Mini)
-Fix: A bug that made the zoom function behave crazy
-Fix: Wrong checking of config menu entries (You may disable the splashscreen now etc.)

http://forum.xda-developers.com/showthread.php?t=693433