I'm remastering a Knoppix 5.1.1 CD to boot straight to Rdesktop, without any user interaction, I got it to work but there is one thing that I'm having trouble figuring out:

I edited this line to isolinux.cfg:

APPEND ramdisk_size=100000 init=/etc/init lang=us apm=power-off vga=791 initrd=minirt24.gz nomce quiet BOOT_IMAGE=knoppix
and added:
APPEND ramdisk_size=100000 init=/etc/init lang=us apm=power-off vga=791 initrd=minirt24.gz nomce quiet desktop=rdp rdp_host=xxx.xxx.xx.x BOOT_IMAGE=knoppix

the problem here is that rdesktop does not start in full screen, and I tried to put -f in this line in several different positions, but without any success.

I also added a file called desktop to /etc/sysconfig with a single line containing: DESKTOP="rdp -f"
What am I doing wrong? any clues?
Is there any other config files that I need to edit so rdesktop starts in full screen mode?

Thank you!