Originally posted by pdescobar
Re#2: That's a good question. There are other factors in trade value, such as the adjusted research cost, but the values alexman discovered may play a role. In theory, you could probably design a test for it by setting all tech costs the same, giving the AI a huge treasury, and seeing how much they'd pay on the first turn of the game for something with a high "alexman-value" like bronze-working compared to something with a low one.
Okay, tomorrow I might do a little test if no one answers.

Thanks for your help.

(even though you didn't really help

j/k)
@Puzzlinon: No 100% guarantee that this will work:
Note: When I say
copy, it's important that you do so, and not
cut
Find the civ3X.bix file in your PTW folder. Make a copy of it elsewhere (your desktop would be fine). Then copy the scenario file of the terrain style you want (in the scenarios folder), and paste it into the main PTW folder, and delete the original .bix file. Hopefully, when you play again (with any non-scenario game), it will have the terrain graphics that you want.
If this doesn't work, or it screws it up, just move your civ3X backup-copy into the PTW folder and delete the scenario file (it'll still be in the scenarios folder), and you should be back where you started, no harm done. I won't guarantee that this won't mess anything up, but I seriously doubt it.

It might be wise to wait for someone who knows what he's talking about to answer, or to ask in the Civ3 Creation and Customization forum.