Are you using 32-bit or 64-bit version of your Fedora 8 (by the way, it's not "Fedora Core" anymore, since version 7 it's just "Fedora")?
Originally Posted by sigiken
Missing Dependency: kernel-x86_64 = 18.104.22.168-63.fc8 is needed by package kmod-fglrx-22.214.171.124-63.fc8
That says: in order to install the package, you must have the 64-bit kernel version 126.96.36.199-63.fc8. If you are using a 32-bit version, you are probably trying to install the wrong fglrx package; if you are using a 64-bit kernel, you need to upgrade that first. Yum should probably prompt you to do that automatically, but you can try it manually too:
Or something like that.
EDIT: note that 64-bit apps/packages don't work on 32-bit system, and usually vice versa. You can install a 32-bit operating system on 64-bit hardware, but you can't install 64-bit operating system on 32-bit hardware. Even nowadays 64-bit Linux operating systems have some "problems" when it comes to software compared to 32-bit operating systems (namely java and such), so a lot of people like to stick with 32-bit Linux even when their machine hardware is 64-bit. That won't get the fullest out of the hardware, but on the other hand, I'm not sure if it's worth it in a normal use anyway, if it means having trouble with some day-to-day software like wine, flash, or whatever they have problems with at the moment.
About the sound..well, can you start a player app which seems to play the audio, but you hear nothing, or does it complain something like "device missing"? If it seems to play (for example the time bar is moving) but you don't get output, you have either muted volumes or something else messed up with the configuration; your mixer application usually helps in that. If it says there is an error with the device, then you need to check your sound card model and make sure that you have drivers loaded for that.
Find your sound card information from the above text (it's long), then
and see if there is a module loaded and in use that is meant to be used with your sound hardware. Check posts here at LQ or do a web search for your sound card model to find out what the kernel module name is that should be used.