When I upgraded to CH USB products from gameport, I was waiting on a Gameport-to-USB adapter for my pedals.
I tried the above mentioned use of mini-stick for Rudders. It worked ok, but if you have flown/played using rudder pedals for any length of time, you can forget it, it is no where close. If as you say, used a rocker switch for Rudder, then the mini-stick should work just as good if not better for you...
Max,
Murdr showed me a trick , as Homeboy mentions, using the mini-stick for moving your head around the cockpit, I have my mini-stick set up for looking over the cowl now, and it is very nice. Let go of the mini-stick and you are back at your default forward view HPS ( head Psoition setting )
hope this helps