Thanks for giving it a go, and I'm sorry it hasn't worked out quite how we hoped.

That remap check box isn't needed by X3 as it understands that a slider can be a throttle - that's there to fix "X - Beyond the Frontier" which doesn't (for my Sidewinder 2 and another player's Thrustmaster 1600000.)

Going back to X3:R the 360 pad worked without anything checked, with the left and right triggers controlling the throttle, but it would spring back to zero when released. The only check-box that I think will affect the game is 'Invert Slider' and all that will do is swap the triggers. In short: using a 360 pad in X3 isn't something my mod is going to help you with.

Ultimately you'll need something more heavy-weight like XPadder to improve this game I think.

(and actually I finished this game with mouse and keys and it was perfectly fine, but to each his own :-) )