Originally Posted by glennzo
If you don't want grub overwritten choose to install Fedora's grub to the boot partition instead of the MBR. Later, you can add Fedora to Ubuntu's boot loader. The 64Bit version works just fine.
Anaconda is the most advanced installer ...
Just install the bootloader in the boot (or /) partition.
Then, from Ubuntu, sudo update-grub and it will find the F15 installation.
Take note that if you install F15 with LVM support you must install the lvm2 package in Ubuntu for it to recognize F15 ...