[Five]

TLH can do md5, ffp and st5. there is a little dropdown box on the right when you generate the checksum that can change the type.

There's a tutorial in my signature which shows where all the buttons etc are and will hopefully explain a few things more clearly. I think that all the information you are looking for can be found there, if there is any confusion whatsoever just post back here, don't be shy.

also worth mentioning is that mkwAct is not longer supported by the autor and is not recommended (at least, not to new users!). Also, not many new sets are being encoded to the SHN format due to its inefficient compression and lack of true "self-testability". Its not an unuseable format, just inefficient... there was one large Beatles set that was around 14GB in SHN that was 7.5GB in FLAC (!!!)