Er, so... 7 months after, could anyone with a AR extract the ROM file after being loaded? I assume, that they wouldn't patch a ROM inserting exceptions in the main "emulation" cycle. A pos-load patch would be mutch more reasonable, altough god knows why did wouldn't they do it on the final file, anyway. I wonder if Sega was unable to "hard-modify" the files due to contracts with the game maker ^^;. Why all the trouble leaving exact ROM data on a CD and ripping and converting into a saturn-able format in "real time"? Maybe bytecomp with the original files would give some idea of the modifications?
Hn, just to finalize my train of thought, could anyone check if both tile or map data for the Title Screen of the US and Sat ROM version start at the same address, using a tile viewer? If it is the same, the "executable" should carry the same offset (or the memory location of the file) somewhere. With any luck, maybe even a table of offsets could be found, and we could start from there looking for the exceptions.
Er, I _do_ belive all this was already tried, but it's never late to sound like a smartass.