Texturing MDLs from Flight Simulator

[sdc16064]

I've downloaded various MDLs (aircraft) from FlightSim.com, and I would like to know how to texture these, as well as make new textures for fictional airlines.

[Couchpotato]

You will probably need to use a multi/sub-object method of texturing.   
There's a good tutorial here:    http://www.republicofcode.com/tutorials/3ds/texture_stealth/