Today I release my 28th script to the forums. So what is it now? This script essentially allows you to use /trunk, /hood and /door from outside your car. I made this in around 15 mins, its fully tested and works. 1.2 now includes a keybinding to open the trunk.
May want to take network control over the vehicle then open the select doors as other players will sometimes not see changes if they or someone other than the command executor has network control of the vehicle.