well you could tell them what they can expect from the mod
The goal of the mod is to create
REALISM 
:
it's based on the idea of representing everything in the game like it was in the battles of the game, with realistic guns, realistic tanks and realistic planes. alot of 'arcade' stuff will be left out so expect pure realism when you play it
e.g.:
-most weapons will kill you with only 1 shot (if you get hit from a bullet you are most likely to hit the deck and not able to do much nemore)
-tanks will have realistic speed and turret turning speed, bullets go at high velocity and go straight forward like they are supposed to.
-you will fear the tiger now, play the mod to experience why
-lot of work is being done on the 3.0 version where things like the class system will be changed so don't worry bout those. we had alot of feedback from our fans and we are working hard to give them what they want, without losing the objective of making the game more realistic. loads of new vehicles will be in the new version, so keep an eye bf1942files.com for the next release!
(o, and learn how to fly with cockpit view, because it's turned off on most servers -> realism)