Hi there
You donīt have to get a new card, soundblaster live works just fine in linux...
If your soundblaster live isnīt a dell card (their SB live uses a different chip - if not sure if there is support for it), then itīs module (driver) is emu10k1. If you are using alsa, try this in command line: modprobe emu10k1 (as root - this will load your soundcards module into the kernel)
Now try to set it up again - this time it should detect it. At least in debian you can just type alsaconf as root and select the card. After this you need to unmute your sound. You can use any mixer to do it, for example alsamixer in bash.
ps: You might want to switch distro, redhat 9 is no longer supported (in other words there are no more security updates for it from redhat). Thus it is not a secure distribution to run. If you still want to use redhat, check out fedora core 2, which was just released a while ago. (fedora is free)