As root edit the /etc/lilo.conf file.
According to http://www.redhat.com/docs/manuals/l...-liloconf.html, there is a default=SomeLinuxLabel section in the lilo.conf file.
Change the label from whatever is present to the label of the windows section.
Save the file and exit the editor.
Again as root run the follwing command from a command line: /sbin/lilo
It should give you some output that explains that it found both the windows and the linux section in the lilo.conf file and the starred * label will be the default entry.
I hope this helps.
James