Firstly, I ponied-up $29 for Ultimate Traffic (UT) which pretty much took care of the bulk of any FS9, AI worldwide airline flights and any-to-all GA traffici I selected from the UT menu.
This leaves me and TTools to fill-in any blanks of my choosing; for this I find doing it the old-fashioned way works for me: that is copy&paste from existing flightplans (FP) any flights and simply editing the lines using
NotepadThere's basically only three TTools' files to work with so it's not exactly brain-surgery we are discussing:
Once one becomes familiar with each delineator in the FP.txt file, it's simply a matter of editing each flight as required.
Reference(s) cited:
John Goodwin's Simple AI