Thanks for your reply.

Yesterday, I was able to install knoppix 3.3 on the sata disk and even lilo was in the MBR and I could boot into it but I couldn't boot my winxp anymore due to the error: "could not find ntldr"
knoppix 3.4 didn't succeed in booting.

But as you suggest, I'll look for grub now because I don't think it's included with knoppix.

thanks and regards,
Lieven