Well, since support for fedora 9 will be terminated next month, perhaps you should consider installing F10 (~6 months support left) or F11 (~1 year support left since F11 was just released).
That being said, you need to find the correct object path and change the anaconda script to use that path. Which, if you're installing from a DVD, means rebuilding the DVD after editing the source. This can be done (look up "spins" and "kickstart" in the Fedora documentation), but will probably be a lot of work.
A suggestion: Download the Fedora 9 Live CD and install from it. (Or, re my first comment, the F11 Live CD.) The Live CD will create a "minimal" Fedora installation, and, if you have the installation DVD, you can use that as a initial repository so you won't need to download all the other applications you want to install.
Of course, after the initial installation, you should run a full update. Since the presto delta rpm system was not implemented until F11, download of the updates for a F9 installation after installing from the Live CD and DVD-repository suggestion I made will probably take just as long as an Live CD installation followed by a yum update and then an installaton of any additional applications you want from the repositories.