If your card is a genuine Creative SB16 it should be working already -check your mixer to see if the volume is up and not muted. If it is an ISA card on a newer motherboard, you may have to reserve a resource for it BIOS, like IRQ5 for Legacy ISA -but usually not. Also change BIOS to Plug and Play OS =No
I believe jmoore2001 mentioned in another thread that he was using Redhat 7.3 -the default kernel as shipped has sound support. Genuine Creative SB16 are definately supported as I was using one with RH 7.3
I believe the driver is already there but getting it to work may require more effort than you are willing to muster.
First off open an xterm, and as root/administrator enter lsmod and report back the results, also try
modprobe es1371 and then test to see if your sound is working.
.... did you try sndconfig from a command line terminal?
-it might be easier to grab a cheap sound card that is compatible - the Creative Ensoniq series are pretty good, in particular those with the ES1371 chipset have never failed me.
It may be also that you could recompile your OS kernel to include built-in support fo the ViBRA 16, but this may be a little beyond your capability right now.
There is still a slight possibility that your Creative ViBRA 16 PnP card is an ISA card and you need to assign a resource to it in BIOS (e.g. IRQ5 Legacy ISA) before your Linux install can properly recognize/communicate/assign resources to the card.
Keep in mind that a Google search is your friend, and Redhat also has Hardware Compatibility Lists.