multiple distros on one dvd-r?

[simple]

is it possible to burn like knoppix and knoppix-std .iso as bootable images onto one dvd-r and get a "lilo" like menu to choose which to boot?

[eco2geek]

It's already been done with multiple mini-distros (i.e. ones that fit on a pocket CD-R) on a CD. See UnderScore's post in this thread. So, there's no reason why not.