Hi, NavyHawk
All the major mod packs have many mods other than aircraft. Since HSFX and UltraPack are the most popular, I will use them as an example. In these two mod packs is a thing called a JSGME Mods Enabler. This is basically a software application which acts as a switch to turn mods or smaller mod packs ON or OFF within the bigger mod pack.
Once you learn a few things about your mod pack, then you can either turn ON or OFF the things which come with it or add mods to the JSGME system and then turn them ON or OFF in the Mods Enabler, just as Lefty Hartnett has written.
You can even add mods from other modding communities such as SAS to the JSGME Mods Enabler in HSFX or UltraPack.
Be sure to verify that the mod which you want is compatible with your mod pack. If you are going to get one or the other of these mod packs, then I recommend getting at least the HSFX 4.1 or the UltraPack 2.0 Later you can install the add-ons for these. (Of course, SAS can help you get mods, too, and they have great quality as well, though you would need to do custom installation of many things there.) Be careful to have your mods backed up with copy so when you intall an add-on, then you can have it in storage in case you lose any mods that you like during the add-on installation. If you do it right, you won't lose any mods.
Here is my guide to help you:
IL-2 Newbie Guide
viewtopic.php?f=29&t=29314&p=332140#p332140
Have fun with it.
:lol: :twisted:
