OK, now I've installed a "Poor Man's Dual Boot" on my new lab of Dell Optiplex GX270s. These machinces came with 3 VFAT32 partitions. hda1 was setup as a rescue disk of 32MB, hda2 is about 10GB and has a full M$ WINDOZE XP install and hda5 is about 10GB and is empty (we ordered these with 2 10GB VFAT32 partitions). So here's what I did to install the lastest version of KNOPPIX on these new PCs.

Step0A: download latest *.iso and cdrecord it
Step0B: place old DOSBootFloppy in /mnt/floppy (I have loadlin.exe there)

Step1A: mount hda5 (click desktop hda5 icon)
Step1B: make hda5 rw (right click desktop hda5 icon, click change rw and click yes)

Step2A: open a root shell (click <K><KNOPPIX><ROOT>)
Step2B: mkdir /mnt/hda5/knoppix
Step2C: mount /mnt/cdrom/KNOPPIX/boot.img tmp -o loop

Step3A: cp tmp/* /mnt/hda5/knoppix
Step3B: cp /mnt/floppy/loadlin.exe /mnt/hda5/knoppix
Step3C: cp /mnt/cdrom/KNOPPIX/* /mnt/hda5/knoppix

Now you can reboot with your modified DOSBootFloppy (see previous post and http://www.knoppix.net/forum/viewtopic.php?t=2273) once you've updated autoexec.bat's loadlin line with any new boot cheatcodes as needed!

Enjoy,