If you want I can go find a CD patch for you. (Check your PM sometime...)
Just remember - ArmA has a system integrated into the game called FADE - that means if you're running a CD patch, the game will basically degrade the game till it's no longer enjoyable or playable. Some patches manage to sneak past FADE...
BTW, does the DVD drive actually sound like it's running when the CD is in the drive?
Chris