Fedora and Ubuntu not working out with GRUB

I have tried befre but nothing works out proprly.
I have Ubuntu
I try to Install Fedora Core 1.
When Fedora Cora is finished Installing It doesnt show Ubuntu on Grub.
If I re-install Ubuntu and put grub on then Fedora wont show.
I also have Windows 98 but that is always on the list as DOS or Windows 95/98

you'll have to modify the file /boot/grub/grub.conf in order to have your 2 distributions
available.

could you post the content of your current grub.conf and the list of your partitions ?

Move boot entery of the first linux distro from it's /boot/grub/grub.conf to /boot/grub/grub.conf of the second one.

Is there some sort of command I can type? Because I dont know anything about grub and there is no useful info on the Grub homepage.

There is. No one could help you if you do not want to read.

This task is extremely easy and I even told you what to do, so find section begining like

title "distro1"

and move it to the active grub's config.

Ok but HOW do I add it to the active Grub's congig