Well in a hurry but you can install most any distribution you want, I have probably 5, suse, ubuntu, debian, the only one that I haven't is FreeBSD (on my to do list). The distributions don't make it as easy to do but there are several ways to do it. The way I have done it is to boot up one a second drive and do the installation there, then re-boot under the orginial FC5 drive and mount the second drive and copy (cp -ax) to a
file.img or your partitions that you want to use. you can also install to a partition on your existing drive but sometimes they may overwrite your orginial boot-loader. Will provide some more detail links that will provide more information but don't have time right now..hope this helps a little right now.
