So, I've been running multiple sistems (up to 6) for a while and found that problem is that reinstalling one of them can ruin others.

My question is: how to install Ubuntu 9.04 and Fedora 10 with their boot stuff on their own partitions and then install Fedora's GRUB on separate partition (/boot)

And please bare in mind that I don't want to use chainloader (from one GRUB to another), I want to use menu.lst to add both Fedora and Ubuntu and Windows 7 boot loader (GRUB probably will add that automaticly).

Thanks for your help in advance!

The default on most distriubions is to install to mbr but, you should have an option during the installation of Grub to install to the root partition of whatever partition you are installing to. Usually, you will need to click on an Advanced tabl during bootloader installation. Doing this will put all the necessary files on the correct partition.

Never used a separate boot partition but, you should be able to find lots of examples by googling it. Here's one:

http://users.bigpond.net.au/hermanzo...boot_partition

Tnx for your reply!

Well, if I choose to install it on same partition wouldn't that make me use chainloader on "main" GRUB? I mean, I will still be installing GRUB, only not on separate partition but on / partition of the distro?

Please correct me if wrong

I am not sure what you mean.
A way to do dual or triple booting is one GRUB in MBR the others GRUB on the partition on which the distro is installed
Only the menu.list of the GRUB in MBR should be modified
Let say ones has also a other distro on sda7
Adding the following lines on the main menu.lst is enough
title distro X on sda7
root(hd0,6)
configfile /boot/grub/menu.lst

As only the menu.lst is called and the menu.lst is keeping
up to date by is its own version nothing can go wrong
Only if you reinstall the version which GRUB is in MBR you have to add this lines again

I'm not sure what you are trying to accomplish here. Looking back to your first post below:

seems like you want Grub in Ubuntu, Fedora and also in a separate boot partition?? In a standard installation, chainloading isn't used and the Grub files from only one distribution are needed. If you look at a menu.lst entry from a base distribution and check an entry for a secondary distribution, you will see the kernel line point directly to the vmlinuz file not to any Grub file.

No, you won't need to use chainloader. Yes you would still be installing Grub but you don't have to install it. Depends upon the method you choose for your entries.

As I indicated above, I've never used a separate boot partition so I'll let others help with this.

Just needed to thank you guys!

You made me realise my mistake, and out of embarrassment I wont even explain what was going on in my brain

Anyway, thanks to all good people here