Oh. I forgot.
If " linux home=/mnt/sda1 " doesn't work, try " pclinuxos home=/mnt/sda1 "
I haven't used anything but the PCLOS CD I remastered for a while now, so if I'm correct, it should have the command for this on the boot prompt screen (it did on older versions of the LiveCD)
And I just remembered: I had gotten a reply on another forum with directions for directly booting from an ISO. I'll try and find it, but no guarantees.
EDIT:Sorry. It would seem that everything requires you to burn a CD that points to an ISO image. I do belive that Knoppix CDs have an option for this but I'm not sure. You can check the cheatcodes.txt for a command like that. If you were going to do that, you would have to create a 750MB FAT32/EXT3 partition to put the image on.
EDIT (Again): take a look at this link.
And if you've got a Knoppix CD, try this:
to boot from an ISO (works with EXT2/3 and NTFS) but if you've got an HP computer, it would be /dev/hda2/pclinuxos.iso