I don't know how to install at redhat, but i would use the sound-drivers of
I think they run better than the normal drivers.
However you have to look if they support your soundcard. There is a list
of cards beeing supportet and their chipset.
To install them search for a Howto. I would give you mine, but I use Debian and there you can do it on an other way quite more simply.
I would also think about compiling a new kernel. 2.2.x is quite old isn't it.