zip (was: Re: Disk archival techniques)

I have some archives that are archives of archives and intend to go back and extract the original archives into un-packaged treed directories then repackage into just a zip format so that future users don't have to figure out the zip format to then have to figure out the myriad of CP/M packaging/squeeze formats. -- Verifying that all of these files are 'correct' of course.. One thing to be VERY careful of is reinjecting files that were bad and fixed later into reencoded archives. When I was more active in arcade game ROM archiving, we ran into this constantly, where someone would find corrupt ROM data and declare them as 'new' versions of the game. A CRC (now SHA1) checking scheme eventually evolved to index what had already been shown to be correct (either though simulation or by finding duplicates of the physical ROMS) as well as a utility to detect when ROM dumps had things like stuck adr or data bits.