Nope.
I replaced all the Sound Effects files from the originals on the CD, upgraded the OS, upgraded CM, got the right Sprockets, I just don't get it!
I'm reminded of the fact that it ran smooth, with fine sound up until about the third scenario, and that something obviously changed. Maybe I installed a conflicting extension, or something.
Either way, I think I'n SOL (SADLY out of luck). It's time I get used to CM sans the sounds or CM avec choppy engine sounds.
Regardless, thanks for everyone's help. I wish it had turned out better, but just like in CM . . . you can't win them all.
Joe Cushing
Littleton, Colorado