High Talon and welcome to ArmaHolic
Anyways to answer your question, open the .pbo up and place inside your other profiles > yourname > missions
then in ArmA2 or ArmA2OA go in to the editor and load it up in there, there you will be able to edit the mission, whats
on it and etc, you can add the A10 and Apache BUT* you will also need to edit the script in the missions folder for
things like "Vehicle respawn" if it was to get blown up for instance.
Hope that helps.