Also look closely at the dialog boxed section of debs install-=- concerning the partition layout ,,,,,,,, you will see any existing partition you have. You can add additional partitions in the available ___free_space___. Well ... were else would you add partitions. I would expect Fedoras installer to be the same/similar there. But ... type ctr-C at any time if your not sure. It probably is best to go through it a few times without commiting if your not to sure.
What ever goes in first ... install a boot-loader -=- whatever goes in second __don't__. I do admit it is something i find somewhat brain dead about Linux installers. They don't seem to like/handle not installing a boot-loader. They seem to think like MS, that their the only OS going on the box. Even debs goes into a mild spin when thats over-ridden.
But pypass the loader on the 2nd distro. Remember the dev/partition layout and the kernel directory/name ... write it down .... Befor you do the reboot --> second stage of the install. The finishing it of stage ... boot into your first distro and add the relevant entries to your loaders config file(s). Re-run lilo if it's lilo. Or use a LiveCD if needed.
In deb, after the second stage install is complete. Explore through "aptitude" or "dselect" for your, ummm, results.
You can also do "dpkg-reconfigure --help" as root to re-go-over a packages configuration.
[a few hours later..]
well i've got debian 'setting up', but i'd still like to know how to get fedora to install without losing debian? (supposing it works that is..)
that is a gem ...