If you fly over your airport in FS is it there?

Have you filled in the Airport tab in the scenery properties?

It is possible that FSSC can't tell FS about the airport at all in FS9, I would suggest you make an AFCAD underlay for your runway with the airport properties and that will make your airport show in the list. You can add ATC and parking while your at it too

The latest version can be found on this page:
http://www.simviation.com/fs2004utilities1.htm

Hope this helps!

FSSC was designed for older sims which used the old BGL format, FS9 uses a developed AFD format to get data on everything to do with facilities. While FSSC can still create scenery for FS9 I don't think it is able to have any interaction.
AFCAD uses the new AFD format and is designed specifically for FS9, by creating an underlay of your runway (manualy but quite fun in slew mode) and adding the Airport information etc your airport should show up in the lists. And you will have the added bonus of easily being able to add ATC, parking etc should you wish to.

Sorry if this is not explaned terribly well...... err, my head...

PS. I don't know about FSnav but that does sound quite strange.

Reap. As Bird man is not around maybe I can clear up your confusion.
Put simply:
FSSC & Gmax create the visual scenery that you see in the sims.
AFCAD is used for the invisible "virtual scenery" used by the AI traffic , airport info, ICAO codes & so on.

Reap. That's the right idea but I think most people would tackle it the other way round. Create the visual airport first, then add the virtual part.

You can create relatively simple 3D obects (API macros) with EOD & import them into FSSC as part of the airport rather than using Gmax to do it separately. http://www.echos.ch/eod/
There's also a selection of existing 3rd  party API macros posted on this & other sites.

I usually think it's best to make the airport in AFCAD first and then make the nice detailed objects in Gmax.

I may end up with multiple BGL files, but at least it's more controlled.

However, the problem comes when you need to exclude something [trees pocking throught the tarmac, etc.]. I usually add the exclusion area in the scenery.cfg file of FS9.

However, the AFCAD airport no longer shows once I do that.

This is what puzzles me.

But right now, I have bigger fish to fry.

Cool.... thanks for all the tips and the links.

What I actually intend to do is update some airports but as I wish to make it as accurate as possible and I imagine that will entail designing some new buildings etc I was going to use gmax for that if I can get my head round its complexities. I shall take a look at EOS though.

I can see where AFCAD comes in now and also FSSC, though quite how do you import FSSC files into AFCAD or link them or whatever you do to get them to work together??

I rather use Gmax instead of using default scenery objects because I wanna make my home airport in FS look exactly like its real-world counterpart.

Besides, the default scenery objects don't blend well with my taste.