I have an old Suncom Throttle with Talon Joystick that's plugged into the gameport and calibrated within Windows the Throttle is a split Throttle and has 2 axis which are Axis 3 and 4.

Only problem is I can't it to register in game as a Throttle it just doesn't do anything this is in F16 Multirole Fighter and F22 Lighting 3.
In Lighting 3 there is a Joyapp that can read all the Axis however it only reads the joystick.
When I use the Hotas setup on Windows 10 with a gameport adapter the app reads both throttles they are assigned Axis Slider and Z Rotation.

Is there anyway I can play around with the driver on the 98SE machine to assign these Axis as a slider and z rotation?