the installer will partition your disc for you, in the default setting overwriting all partitions on disk.
if fedora 10 is worth it? well depends on your needs and experience. If you are very good at linux, dont mind getting your hands dirty on the CLI, don't mind reinstalling you pc in 18 months, like cutting edgde packages that ubuntu gets in 6 months but have to be "beta"tested in fedora, like package version upgrades during a release lifecycle, like RPM based distros, prefer RedHat over SuSe or ubuntu server, know what to do when the updates package breaks and cannot update itself, if you know and understand fedora will *never* provide or make it easy to get non-free packages, know that it runs SElinux and a firewall by default ..... then yes fedora is very much worth getting, i run it on all my pc's and like it very much, only Arch seems better at the moment...
if you want to have things "just work" (TM) and for a long time too ..... use ubuntu 8.04 LTS.
"$ su - bofh"
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