Thanks,
did so, then run lilo, but it does not work:

jan@testboxhda9:~$ su root
Password:
root@testboxhda9:/home/jan# lilo
Added Linux *
Added Windows(hda1)
Added Windows(hda5)
Fatal: First sector of /dev/hda6 doesn't have a valid boot signature
root@testboxhda9:/home/jan#

So how to make a valid boot signature from the original lilo.conf file and how to install it into hda6 partiton?

JanMartin