Well, if the driver is a binary you can try the insmod command and see if that works. The problem is if the driver was compiled for a different kernel, it will not work on yours.
If that's the case, you need to get the kernel source and the driver source and compile both. That is not something that a newbie would really want to get into, but since you asked . . .
This howto (http://www.ibiblio.org/pub/Linux/docs/HOWTO/Kernel-HOWTO) will give you a good start in compiling the kernel. In fact, in general, you're going to want to keep The Linux Documentation Project site (http://www.tldp.org) handy. It has lots of reference and howtos for linux.
By the way, you can download Red Hat 9.0 for free here (http://www.redhat.com).