Prior to installing FS-AOM for the first time, I had already downloaded and installed a large number of AI aircraft, both from PAI, Avsim, and other sources. Can anyone tell me, how do I get FS-AOM to recognise these and add them to the default aircraft list without adding each aircraft (over 1000 of them) separately.

I manually installed a couple of flight plan sets, and I noticed that the assigned aircraft are displayed for the set at the top of the list, but when I click on a set further down the list, the displayed aircraft don't change. So it's impossible to tell whether there are any assigned aircraft for a particular set of plans.

Finally, is there a way of assigning a different aircraft to a specific set of flight plans (for example: if an A320 from PAI is already assigned, and I want to assign another aircraft from say EvolveAI) ??