I do a lot of flying in and out of KLSE (La Crosse, WI).  I have used RWY12 to add some hangars and other objects.  There is a Cessna Grand Caravan 208 that leaves shortly after and very nearby whenever I start my default flight from there.  I followed it for several hundred miles in the Mooney.  I would like to change it to a different aircraft.  There are other planes doing touch and gos and landings.  Is there any way to get a record of all AI traffic in and out of KLSE or any other specific location for that matter?

A good tool for sorting out the AI traffic in your 'active area' is the Traffic Toolbox SDK for FS2004. (Microsoft)

It installs a set of 'Tools' to the menu bar of your flight window.

In particular, it's 'Traffic Explorer' lists all AI in the 'active area' and their current state.

The info can help in modifying and/or testing flightplans.

Off topic: There are also several options you can apply to a selected AI aircraft.

One of the 'funner'  options is 'Set Flight Plan' (to any parked ai). Assign any saved flight plan (*.pln) and the ai will fly it, including waypoints. This makes flying along more interesting that the normal ai 'direct route'.

Dave