Are the .bin files found in Grand Prix 4\MenuData\PC\GP2001\Objects required for anything?
The same files are found inside the individual track .wad file so I was thinking the files in Grand Prix 4\MenuData\PC\GP2001\Objects are redundant and could be deleted?
Do a test, move them out of the directory and see what happens. That way you can restore them if you have to. I wouldn't bother, unless you are really desperate for free space.
And some driver art files (for Panis and Villeneuve, swapped initially, then re-swapped in the 1.02 patch) are outside regular .wad files as well. The program looks like to have a fallback option to look for these files in the main directory.
Yes, Geoff said so as well in an interview something like that they had to hurry up due to the planned closure of Microprose. I suspect a lot of finetuning work never took place - I blame the vanilla game's occiasional crashes and the relatively high system reqs on this.