How to upload a building set?

[VetinarisClerk 270]

I am building a Mediteranean city with the European architecture set, but it looks too Germanic.
So I oppened the BAT and re-skinned the sample houses that come with it. A lot.
Then I re-skinned the sample highschool. Because the default one looked too American.
Now I have 31 buildings. Rendered. Somewhere. They work fine in-game. They Look like this:

How do I upload the files and building list here? Just mass upload the .bld files or?

Thanks in advance.

[Cyclone Boom 16,851]

While I'm not a SC3K expert since I'm only into SC4 myself, based on existing files in the SimCity 3000 Files category they are .bld files indeed. If uploading multiple of them in an individual STEX file submission, it'd be a good idea to add them to a zip archive so they'd all be contained inside to be downloaded as a package.

Hope this helps!