I can create 2 datfiles for GoodPCE, but they will cover the files without headers (which seem to be needed) and you'll have 2 crc32 per file because of different byteordering. Cowering forgot his export function in GoodSNES, so for SNES and PCE you have to create a datfile on existing collections (which I personally don't like)....and noone has done that yet.

Roman Scherzer
ClrMamePro