Regarding cataloging your airplanes so they're easy to find, one thing that I do is edit every aircraft.cfg to set up their information consistently.
At the top you'll find a section like this for each texture set for the plane model you are looking at...
(p.s. always make sure that [fltsim.x] field is properly filled out. I don't think order matters, but obviously it's easier to manage them if you number the sections for each plane in order, starting at 0 then 1,2 etc.).
[fltsim.0]
title=ALPHA T-34A, Bare Metal
sim=T-34
model=A
panel=
sound=
texture=A1
kb_checklists=T-34B_check
ui_manufacturer=Beechcraft
ui_type=T-34A Mentor
ui_variation=bare metal
ui_typerole="Military Prop - Trainer"
ui_createdby="Alphasim Ltd"
description="© ALPHA Simulations 2004\n\nThe T-34 Mentor was a result of Beechcraft's private effort at creating a trainer based on the Bonanza. The new aircraft had tandem seating and a conventional tail rather than the distinctive Bonanza V-tail. Known as the Beech Model 45 Mentor, the aircraft first flew on December 2, 1948. A total of 973 T-34A and T-34B aircraft were ultimately ordered by the USAF and US Navy. In 1960, the USAF adopted an all-jet training program, whilst the US Navy phased out the T-34B in favor of the T-34C Turbo Mentor. The T-34 was widely exported, with Japan, Argentina, Great Britain, and the Phillipines being among those countries to use the type. Many are still flying, although a number of Airworthiness Directives regarding the wing have grounded these until compliance has been shown."
atc_heavy=0
atc_id=
atc_airline=
atc_flight_number=
atc_id_color=0000000000
atc_parking_codes=T34
atc_parking_types=M000
visual_damage=0
The lines of import are the bolded lines above. These are used to sort airplanes in the "Select Aircraft" menu. There are three pulldowns at the top, Aircraft Manufacturer (ui_manufacturer), Publisher (ui_createdby), and Aircraft type (ui_typerole). You can put whatever you want in these fields, and FSX will then display them in the pull-downs.
In FSX they created a new parameter ui_createdby. So I always change ui_manufacturer to the aircraft's manufacturer, and change the ui_createdby to the author of the airplane model. Then I can use the pull-downs to filter airplanes by those fields. For ui_typerole, again, you can make up whatever want. Personally I've standardized on the following:
Aerobatic
Collings Foundation
Commercial Airliner
Four Engine Prop
Glider
Golden Age
Ground Vehicle
Historic
Military Jet
Military Prop - Bomber
Military Prop - Fighter
Military Prop - Observation
Military Prop - Trainer
Military Prop - Transport
Modern Military
Propliner
Regional Jet
Rigid Airship
Rotorcraft
Single Engine Prop
Single Engine Prop Amphib
Single Engine Prop Floats
Single Engine Prop Ski/Wheel
Single Engine Prop Turboprop
Twin Engine Jet
Twin Engine Prop
Twin Engine Turboprop
WWI
You can create whatever categories you want, and they will be listed under Aircraft type: in the Select Aircraft menu.
One very important caveat about ui_typerole, and I imagine this may be true for all fields: Once you label a plane ui_typerole, all the rest of the planes of the exact same ui_type in that aircraft.cfg file will use that same value for typerole, no matter what you put in in ui_typerole for the other planes.
So, for instance, if I have ui_type=B-17G in an aircraft.cfg, and I want some to be ui_typerole="Military Prop - Bomber", but one of them I want to be ui_typerole=Collings Foundation", I have to change the ui_type for that plane to be something else, like ui_type="B-17G Collings"
Another interesting fact you may have noticed is that if "Show all variations" is unchecked, then the label under the picture is just whatever is in the ui_manufacturer ui_type fields. If you check "Show all variations", then it displays ui_manufacturer ui_type ui_variation.
Also, if there is no ui_typerole for a plane in a aircraft.cfg, that plane ends up being put in the typerole "Legacy".
Whatever text you put after a \\ will not be read by FSX and is useful for creating comments so you can remember what you were thinking.
By taking the time to be consistent in all my labels, it makes finding the planes I want much easier, and my OCD doesn't go wild when I look at any of the pull-downs
