TreoSkey maps the following keys in this manner: Side Volume UP Button -> 5-way UP key Side Volume DOWN Button -> 5-way DOWN key Side Button -> 5-way CENTER (Select) key You can use [Shift] + [Volume Keys] to change volume, or [Option] + [Side Button] to enable or disable TreoSkey anywhere on the Treo. NOTE: You may need to press [Option] + [Side Button] once to enable TreoSkey in a fresh installation - after selecting the [Enable] checkbox and pressing [Done] in the TreoSkey configuration form.