You can replace any of the All-star courts with any other court as long as you rename every .fsh, .ebo, .o etc file in the viv also. That gives you 5 lame courts you can overwrite. Then there's the European, the International, the Rookie, and the RBK Allstats courts you can overwrite also.
For example, I deleted the 80's court (as80.viv), replaced it with Detroit's court, imported Spurs logos into the fsh files, and redid the colors in the ebo file to make the Alamodome, and here's the result:
I also made a Chicago Stadium court to replace the 90s one, but I'm having trouble with the graphics when I import them. All the floor logos are stretched a lot and when I import them from png with fshx they become jagged. I just got the Photoshop dds plugin though, so I'll try to see if fshx does a better job importing from dds, although I'm scared the problem might be that court graphics are done in 8-bit palette color, which would make them way harder to do.
