What are you intending to do with the trackball, if you install it.
If it is just for Windows navigation, then buy a wireless mouse, and throw the receiver inside the cab.
An alternative to this is to set your front-end to autoload.
Most of the front-ends support joystick navigation, and button entry.
If it is to play games with, then the joystick is a really bad substitute.
You CAN play SOME games with a joystick, but it doesn't work nearly as well.
MAME uses the joystick to send a "go that way" command; the speed of which is set in your preferences.
If you set the preferences too high, you go too fast, and can't do small movements.
If you set it too low, you go to slow to get where you need to in time.
Missle Command is a good example.
If you set the speed too low, you will watch the cursor move slowly toward the top as it goes.
If you set it too high, you won't be able to do small adjustments to the cursor, and will miss alot.
The amount you need to move the trackball at any given time changes, so ANY setting will have times where it is too slow, AND other times where it is too fast.
For games, you don't really need mouse buttons.
You can configure the games to use the other buttons for fire, etc...