ArmA 2: Operation Arrowhead Message Board  

Right - I might be totally wrong about this - but what is the point of creating a trainer to work with version 1.55.0.75556 when, according to the beta download page for arma 2 (Link) this version doesn't exist? The standard (non-beta) download updates to 1.55.0.75445 (at least on my PC).
I take it these trainers are written for Steam versions? Why? I buy and play games like Arma 2 specifically so that I don't have to use Steam (which is intrusive and unnecessary in my opinion - but that is another debate)
Why do CheatHappens publish trainers (in specific regard to Arma2) for versions I never have or never can find?

We purchase what is readily available to us and we're not too keen on having to buy 10 copies of the same game nor create 10 different trainers and have to update all 10 of them when patches come out.

If you're even in doubt, wait until a trainer is created before purchasing the game to know which ones will be compatible with the trainers.