[Five]

when you say "wav" format do you mean an audio cdr? (since you say you have to "eac" them)

in that case you could try ripping them with EAC, and if it was burned with EAC offsets corrected and you rip with EAC offsets corrected there is a chance that the .st5 checksums could match. if the only checksum archives you can find are antiquated .md5 checksums for the shns you will have to try encoding them over and over with every possilble setting and the .md5 will probably never match. that's a big reason why .st5 (aka shntool md5) is a million times better.