Dual Lilo boot with Debian and RedHat

[Andrej Prsa <andrej.prsa@fiz.uni-lj.si>]

Dear Debianists!

I have a problem and I hope you can help me out!

Yesterday I installed Debian Woody 3.0r1 on my laptop. I have been using
RedHat 7.3 and I grew tired of things not working the way they should,
so I decided to try Debian out. I have a 40Gb disk, which was completely
under RedHat. Now I repartitioned it to be only 20Gb, 10Gb I gave to
Debian and 10Gb are still free. Now the structure is as follows:

/dev/hda1 is RedHat's /boot
/dev/hda2 is RedHat's /
/dev/hda3 is Linux Swap
/dev/hda5 is Debian's /

I used to have Grub to load RedHat, which has now been replaced with
Lilo in MBR. It boots Debian without any problems and now I don't know
how to boot back into RedHat. Mounting works fine, both /dev/hda1 and
/dev/hda2. But if I try to add either to lilo.conf, I get "not bootable"
problem. What do I do?

I would be happy to attach RedHat's grub.conf if it'd help!

Thanks a lot in advance!

Andrej