brother, ini files are one of the easiest things to edit in this game. Notepad(the software that comes with any windows version) and knowledge are all you need.
as for postiions on aircraft, if you are talking one thats already in game, try Mue's LOD viewer to get you in the rough area. it wont tell you 7.26725, 5.0085 specific, but get you 7.27 and 5. you then play with the numbers to fine tune
its better still at its designed purpose, helping view skin and decal edits without firing up teh game
if youre talking about an aircraft that still need to be imported into the game, i'll defer that to the modellers
but as to your original question, everyone who ever made a mod, even just a simple skin, had to edit an ini