Right, I understand.
I don't do it that way, simply because when you get into doing more detailed (IE-AFCAD and other programs) you don't get confused.
Just don't use numbers for your aircraft. You end up with a Boeing 747 being labled [fltsim.2108] and the title being Boeing 777-300 Paint256, you start using AFCAD to include your repaints and everything starts going pear-shaped . . .

I always use a name for my new aircraft, such as POSKY Bush for a bushplane made by Project OpenSKy. This way, I don't have any confusion when I add it to Traffic Tools.
BTW, Traffic Tools (TTools) is a program that will add air traffic for you. There are a couple of progs that will do itl, but I recommend finding PAI and installing their software, unless you are familiar with the system.