Yes, RHL9 is basically a dead OS, sorry but true. This is is for the last of any freely available updates for RHL9;
http://www.fedoralegacy.org/
Suggest you at least update the system to the latest and install/use alsa for your sound card support. Check the output from the typed command "lspci -v" minus the quotemarks then visit;
http://www.alsa-project.org/ to find the possible support configuration options.
