Many of the isos use propritary os's like the seagate diag cd, acronis recovery expert, and oo bluecon(?) i know how floppy image handlers work, and have made some multi windows/winpe cds. I tried this with Drive Image 7 for example, and it refused to boot when combined with winternals erd. >You could do what a traditional multiboot does, and extract the ISO to the >DVD/CD, then have cdshell (or similar) load teh bootsector of the iso, which >then would act like you loaded teh entire ISO. This may require some >hexing....