Hey sub
You could check out this thread
http://www.damnr6.com/yabbse/index.php?topic=8491.msg115518#msg115518As for cheating in Ghr, in the pc world Ghost recon has been seriously hacked.
Wall hacks (like you said transparent walls) and uniform hacks
(opposing teams have brightly colourd uni's instead of cammo)
If these hacks ever made it to mac I have no clue.
Ofcourse being new to the game you could quickly think other peeps are cheating,
but because more experianced players have been playing for a couple of years
now they know most of the maps by heart, their skills of the game have improved.
My believe is that most Ghr and RvS players don't cheat , but there could be guys out there who wouldn't hesitate to use the hacks they get their hands on.