If you are sure that this is an ISA card:
You will need to install isapnptools and isapnptools-devel with your package manager or urpmi. Then if you reboot it may pick it up? If not, look in /lib/modules/your-kernel-version/kernel/sound/isa/sb, the module should be there? I would suggest trying snd-sbawe with, as root
modprobe snd-sbawe
then with your gui hardware manager, or in a terminal as root using
alsamixer
see if your card is working. If not, try another module in the same directory. When you have found a working module, you can add it to /etc/modprobe.preload so it loads at boot. Please let us know it you have any questions?
Please post the output of
dmesg