Disabling twist rudder

Ok, I know there must be a way to do this. I am running WinXP pro, CH pro prdals, and a CH flight yoke. All are gameport. The problem is that when I want to use my MS Sidewinder, there is no way to disable the twist rudder and enable the CH pedals. I have tried deleting the rudder assignment from within FS2002, but I can't get any response from the CH pedals. It seems like a lot of people are using stick/pedal configurations without problems, but I'll be damned if I can figure out how to get these to work together. :-zhelp Any help will be appreciated.Thanks.