Put all odfs in addon dir.
Put MPVehicles in ure bz2 directory, or juts copy this:
ispilo_rifle_skel.xsi fmispilo FM ISDF Pilot
ispilo_rifle_skel.xsi fmisphov FM ISDF HoverSuit
sspilo_rifle_skel.xsi fmfspilo FM Scion Pilot

and paste it on the bottom of ure mpvehicles list.

What it does:
Quicker pilots added.  Hover pilot also.