the first paragraph is only the default choise, the following paragraphs are alternatives at booting time

For example if at any time you want to boot into txt screen this part should be edited with yours personal cheatcodes

LABEL knoppix-txt
KERNEL vmlinuz
APPEND ramdisk_size=100000 init=/etc/init lang=us keyboard=es xkeyboard=es screen=800x600 floppyconfig apm=power-off hda=scsi hdb=scsi hdc=scsi hdd=scsi hde=scsi hdf=scsi hdg=scsi hdh=scsi vga=normal initrd=miniroot.gz nomce quiet BOOT_IMAGE=knoppix

NB: I am guessing here but it works