I use the same stick. As far as using the indention for WEP I dunno..maybe. I haven't tried it yet.If it works let me know. :-)
For stick config I use the trigger for main guns, the top center(fox 2 button) for my secondaries. I use the index button (just above and to the right of the trigger) for zoom. The top right button I use for Combat Trim toggle.
On the throttle, I use the top button on the side for flaps up, the second for flaps down, and the third for WEP. The button on the front of the throttle (beside the rocker switch) I use for view toggle. Everything else I use the keyboard for. :-)