hmmm sounds entertaining.

I find most of the general aviation airports to be pretty...barren. Might have to give it a whirl. just download and install?

Although I believe there is no problem but I would rather ask. Is there any problem with simultaneous usage or Project AI?

To answer your questions:

Yes it does work with FS9, it was developed for FS2002, but the flightplans are really all that it's making.  The only minor thing that you'll have is some flightplan errors for some of the smaller grass strips.  They don't have any noticeable affect though.  This may be fixed by taking a current airports list and substituting it with the supplied list, I didn't look too far into it since they are such minor fields.  The generator already had plans for over 10,000 aircraft.  You can also set it to compile plans with different GA plans each day of the week.

It won't create any conflicts with any of the previous flight plans.  Since this program appears to generate the traffic based on the settings that you type into it.  I'm running these flight plans with UT and PAI with no problems.