Convoy Trucking

hi, i have a problem with my gta, it crasheses when i use secondary fire keys, i mean not a particular key (like ''L' or 'LCTRL') but the function secondary fire whatever key i assign to it.
My question is:
seen that in this server secundary fire correspond to cruise control, can i disable the in-game cruise control and use a mod to do the same function? otherwise i could not use cruise control...

for cruise control mod i mean something like this mod

http://www.gtagarage.com/mods/show.php?id=5775 (http://www.gtagarage.com/mods/show.php?id=5775)

THX for answer and for time

Drawbacks are: The car acts like is driven by magic, that is will not decrease speed while colliding with stuff and of course will take damage. It behaves strange while flipped as in the car will drag on its back as soon as you exit it (while flipped). The speed is actually lower than the current speed - I have no idea how to calculate the correct value for it.

I dont think this mod is allowed.