Old post, I thought it might help if I shed some light on your problem.
I downloaded a zip file a few months ago, but my tom727 and 310 both work.
If I have read your post correctly, your issue with the tom files are poorly setup.
Need to read the install procedure, some have extra files in folders you need to place in your FSX standard folders or they wont be recognized by the sim.
Sound files into FSX/SOUND--------------For your sound files ect...
Gauges files into FSX/GAUGES-----------For your clocks ect...
Effects files into FSX/EFFECTS------------For your lights and smoke ect...
Also check your aircraft.cfg there you will find the file names your aircraft uses, you will find this in each aircraft folder:
The FSX is the Microsoft Flight Simulator X folder where you installed it to. Most have this located in the C:\Program files (x86)\Microsoft Games
Some have changed the folder location and/or name.
Sorry it took so long to reply to your post. I have only just stumbled on it.
Better late than never
If you haven't already fix your problem, I hope this helps you.