first of all go to
http://atrpms.net and download latest alsa-driver,libasound,alsa-libs and alsa-utils rpms installed.then run alsaconf it will get ur sound detected.
for ur information redhat 9 is an old distro,get latest Fedora core 5 installed.
regarding internet connection,u can easily setup a dial-up or adsl internet connection in RH/Fedora.in redhat,a configuration utlitity,run this and configure:
Code:
redhat-config-network-druid