I believe that using the FS2002 version of AFCAD to edit the runway like it's done in FS9 with this sim's AFCAD version and FSX with ADE9X (
program that works with FS9 too) should work fine. There's no reason why it shouldn't. :-?
Don't ask me where to find the AFCAD for FS2002 or its operative differences with the FS9 version, though. As much I'd like to help you out, at the time of that FS release I was re-entering the hobby after that a life-threatening accident happened to me in July 2000 kept me almost three years on a medical limbo, and never really got around to learn anything about FS2002 beside using it a little (
my personal engines would get warm only after FS9's arrival).
There is no such a thing as overkill. Only unworthy targets.