Hmmm, You don't need to combine topics in one thread. You also should use the search feature since there are already topics on ejecting troops and paradrops, etc. You should also rename your thread titles to be more informative of what the topic is, not "Arma help".
To answer that last question though, we would need more info about how you're actually doing it. But before you post a new thread on it, make sure you are ejecting the whole group and not just the leader, make sure you also unassign them from the helo if you moved them into it, and then make sure you've searched for threads related to this with key words such as Ejection and paradrop scripts.
The artillery may still be usable in Arma if its just a script. You may only have to replace class names to get them to work correctly. You can find those in the COMREF as well. Weapons