Don't know if this helps, but my working grub stanza from my USB hard drive is below. Other than the partition number, directory and livecd= names needing to be edited, I would think it should work.
title KDE2012 ##
kernel /kde2012/vmlinuz livecd=kde2012 initrd=initrd.gz fromusb root=/dev/rd/3 acpi=on vga=791 splash=verbose fstab=rw,auto,noatime
Note: No UUID in the root= option. Edited to fit your installation, it looks like this;
title KDE ##
kernel /KDE1/vmlinuz livecd=KDE1 initrd=initrd.gz fromusb root=/dev/rd/3 acpi=on vga=791 splash=verbose fstab=rw,auto,noatime
Leave the two ## characters after the title name, and copy/paste the stanza into your menu.lst, below the original first stanza. That way you can tell which to try when the boot menu appears, without changing the existing stanza.
If it works, you can edit your other stanzas accordingly.