Welcome to LQ, hhg.
I wouldn't have thought it'd be easy. There is a 'program' that lets you use doublespaced drives under Linux (see this tucows page
), but I don't know whether you could use it in conjunction with a normal zip-slack. My guess is, that you'd need to first install zipslack somewhere else, install and configure the above program until you're happy that it'll boot from a doublespaced umsdos partition (zipslack doesn't use ext2, it uses umsdos) and then perhaps transfer over to your current doublespaced harddisk.
It seems like quite a bit of hassle. You could
, I suppose, make a damn good backup of your stuff, blank your harddisk and put zipslack on, get it working OK with doublespace, then put your backup back onto the disk...and hope that your dos/win setup hasn't gone awry in the process.
Hope this helps...keep us posted on your decisions, problems and triumphs.