Finding Dummy Files

[Neon]

Hi all.
I want to convert Street Fighter Alpha 3 to selfboot. I'm using the Echelon Self-boot guide. My problem is SFA3 has a lot of files that are in between 10-16 megs (mostly .bin files). How can I tell if these are dummies? I'm using a hex editor to look into 'em, and I notice a substantial amount of info in them that is not present in the dummy files I create (which are basically blank). Does this mean SFA3 cannot be converted to self-boot? I've tried to just convert the game as is, but I then get a disc of about 82 and a half minutes....Far too big.
Anyone gotten this game to convert? Any help would be appreciated.
Thanks.