sure
I changed my dvdrom fstab setting so it wasn't using supermount you can do this with mandrake control center after install you can change it back this seems to require a restart
if you copy the install script from the dvd into your home directory and run it from there
it will mount the dvdrom itself it gets stuck after copying only a few files but if you type "export SETUP_CDROM=/mnt/cdrom" before running the install script it will then install happily.
It may work with supermount if you type "export SETUP_CDROM=/mnt/cdrom" before hand but I didn't do it like that so I wouldn't know.
Is that any help?