HDC 2450 + hardware kit

Hi, Can anyone recommend me a RC, optical enconder, and analog joysticks that works with HDC 2450?- Not to cheep, not to expensive ;)

I have been looking in \"Links to 3rd Party Accessories\" but I have no idea, of wich model can I use.

The HDC is for program a wheelchair.

Thanks

I have a JC 200 P&G control with this spects>
Positive voltage supply Red
Center tap Green
Zero voltage supply Black
X-axis output voltage signal Blue
Y-axis output voltage signal Yellow

To which pins of my HDC 2450 do I need to connect the joystick?

Thanks
xxknxx