toms
There's a "complete" (nothing on TIE Fighter) TacOps library starting from the first link in my signature. Navigate "Tactical", X-Wing Tours of Duty, and then Tour 3, Mission 14 for the trench run TacOp. BTW, you fly it again in B-wing Historical Simulation #6, only this time in a B-wing. If you're too lazy to go through all that, you can find the TacOp in question here (
http://www.crs-morningstar.net/tacop.php?id=136), but learn to navigate the site, because you can always come back to these TacOps if you have trouble w/ the later missions.
I also find (though not on my comment for the TacOp) that if you get rid of the T/As as well as the T/Fs, it will make your life easier. Don't worry about wasting time, either, b/c there's no time limit in a Tour of Duty mission. ;)