Nice to see that it helped, have fun (mission 4 is awesome)! :-)
btw: as Tonci pointed out:
So, if some errors with the game pop up, it is usuall usefull to have a look at the so called rpt file (arma2.rpt) wich is located at the appdata folder (i.e.: C:\Users\<your name>\AppData\Local\ArmA 2\).
I wasnt aware of that too, but find it very usefull meanwhile.