One Directory, Multiple sites

[webwriter]

I am thinking this is possible, but not quite sure how to make it happen.

I want to install a master directory on my site that is broken out by cities. It includes all the directory listings of all the citites.

Then, on each city site, I want to only show their city's listings.

All sites are on the same server and run from the same database but have their own URL. (For the record, these directories accompany other local content as well- I just want a good way to organize it all.)

So, I'm thinking I set up the main directory with the cities at the top level, then each has the same directory structure under the city.

Then I just need to figure out a way on the "home" page of the city level directory, to only call that category.

Should be easy, right? :|

[webwriter]

Oh, and I'm also trying to think of a relatively easy way to add a new city without manually adding all the levels of detail. I think I could export the database structure, isolate the directory tree from another city, change the city ID, then import it back in...

Sounds reasonable?