Your question not seems to simple to me...
Until know never tryed, but Why you need to put it to a DVD?
I Recomment you to leave the downloaded tree in your hard disk and install from it (better from a fat 32 partition)
For me is the easiest way.
In the images directory (pub/Linux/Mandrakelinux/official/10.0/i586/
look for the boot.iso image, burn it to a CD y launch your PC from it, choose installation from a hard disk and you are done...
To copy the tree to the DVD is redundant because you always will need the boot image (floppy, or an alternative CD driver) and if your drive is too new chances are that it can not be recognized at install level.
In linux the easy way is exactly that... the easy way.