There is no way during text-mode install to add lines to the lilo configuration. It detects the Windows and the new linux install and automatically creates entries, but there is no way to add a line and configure an existing linux installation. Hard for new users to fix that later (mount, create correct lilo.conf etc).
Please try and report bugs against the correct component; to report bugs against the install process, use the 'anaconda' component.
I will add this to the feature request list.
Moving to RESOVLED - DEFERRED from CLOSED - DEFERRED
Will be possible for the next release