My computer melted down on the "games" side so i am now using the other side. (Curse you RAM!... Dont ask). Anyway i havnt lost my files so its all good.
I am PMing right now
. as for the hands on the handle bars, it is feasable to have on all stearing wheels for vehicles except for helicopters and planes although it does mean the view is locked in a forward position, which isnt really acceptable in most cases. This is due to the fact that it is an exploit of the chase cam which is, as far as i know, hardcoded to follow the main Player controlled object. It works in the bikes case as the controls for moving your veiw are used for the balance and so there is no downside with or without. the reason it wont work on helicopters is because of the way the chase cam follows its target... It doesnt follow the vehicle in a straightforward way, when you did a flip you would see the problem 
. if anyone knows of any way to change what the chase cam follows it could be done with every vehicle and mounted weapon in the game .I have already tried having the PCO as an ivisible object with everything else in the hierarchy parented to a rotational bundle connected to it, however i think the main seat is always connected to this object so it moves with it... in short - it doesnt work
.Im guessing its all hardcoded
The only other thing i think may be usefull is the fact that i may have worked out what was causing the insane lag on the current dirtbike, i think it is a problem with the BF2 netcode and wheel spins - sounds a bit odd i know but it is an educated guess. I think this problem also exists in the insurgent cars due to the same reason but not to such insane effect. I havnt been able to test this as i havnt got the server access and it only occurs online.
Here are the .con and .tweak files
Just made a new version with slightly better suspension here
