3Dsimed and then export them as a 3ds file ... and save the textures to the same folder that you saved your 3ds file.
(note: save the 3ds in 8.3 format to ensure that you can successfully add it to the xpacker tool).
No need for max at all as long as you have BTB and 3Dsimed ... besides ... how many people can legally aford 3DSMAX?
I had my copy because we used it at work and the company had a multiple licence, I lost my job and lost my MAX ... oh well, I never liked it ... :bolt:
I haven't used the xpacks much as I still use simed to put objects into the tracks, I can only guess that when you export from sketchup your model is made up of two or more objects (sketchup does that some times) open it in simed and explode all objects befor exporting to 3ds again, might work.
Thanks for pointers for the grandstands. I'll def be trying them when I get home.
Right now I'm working on a track which is kind of a speedway/road course blend. It has the speed of a speedway, but there are two slow corners (60-70mph). I'll post a WIP version of the track this weekend, hopefully with a working grandstand.