Thank you all for the answers.
The textures are 512 x 512, only the panels are 1024 x 1024, but it is not a problem to do a second folder with smaller textures ;)
The only remaining lightmaps are the tubolifts' ones: will do tomorrow.
Then I'll animate the chairs and the doors (hoping that exporting the bridge to 3dmax 3 will not eliminate that step: I don't want to give more work to Baz!)
Personally I'd like to see a bit more shadow/atmosphere
Yes, you are right: there isn't much detail. But this is my first successfully build bridge! Maybe I'll do a second version with some shadow (easy to do: will be a retexture of the lightmaps!).
I choose these regular lights also because I like a lot the atmosphere of Baz's bridge: it is really "smooth".