Mixing gameport and USB controllers in XP?

Is it possible to get the gameport to read data into the computer as a controller function..... when the main controller (stick, rudder, throttle, some buttons, etc) is running via the USB port?
If not...... any suggestions on how to read the position (value) of a 100K potentiometer into the sim?
best,
...............john
If not...... any suggestions on how to read the position (value) of a 100K potentiometer into the sim?
best,
...............john