1) Go tto HMT v3.5 and open up the map u want to have a warthog fly.
2) Go to vehicles and then go to the tags to the right.
3) were it sais vehicle id click on the pelican/dropship part.
then save.
4) open up a map with a pelican ( try b40 ) then go to the vehicles part and then open up the pelican.
5) Go to top speed forward and then right down what number it sais (i cant tell u because im at work and i dont have halo or hmt here)
6) then go back to the map that we made the warthog fly
7) then go to vehicles and then warthog ( if u havnt figured that out:) )

9) and then go down to seat and click on the menu and select the 0 and 10) then were it sais P-passenger type in W-driver then save the map and play
if i missed anything ( i didnt ) tell me
lol
bty i am a master at hmt and pm me if u need helpwith it ( i cant pmi sorry )