Recommend using this installation method-
Snort, Apache, SSL, PHP, MySQL, ACID on Fedora Core 2 Installation Guide
I seem to remember a slight problem with the guide when I installed it. I uninstalled the rpm, and installed snort via tar. Otherwise I followed this setup guide pretty strictly. You can skip the first few sections...they pertain to installing Fedora Core 2.
Anyhow, I could be mistaken about the guide being a bit off, and may have used a guide for RH 9, and the guide how now been updated to Fedora, and supports an RPM install of snort.
If you have problems, shoot me a private message...more than happy to help.
BTW- when I installed via tar, I copied the snort.conf file, then installed via yum. I then copied the snort.conf file back on top of the rpm snort.conf file. Now I have auto updates of snort.
ACID is great- it gives you a web based util to view intrusions, and really makes it more simple to look at. I recommend ACID, it just makes things look better...and truely somewhat psychidelic (not really, but it sounded cool).