Nebie wanting help please

Hi
Newbie wanting to edit the defult FS2002 airports.
First of what tools would i need and where would i find them?
Secondly how would i go about editing the AFCAD files?
Any help would be very much appricitaed.
Stiz
Newbie wanting to edit the defult FS2002 airports.
First of what tools would i need and where would i find them?
Secondly how would i go about editing the AFCAD files?
Any help would be very much appricitaed.
Stiz