check /etc/modules. i'm unsure if redhat still uses that file. it's a list of `default' modules to load at boot time. just edit it.
if it's NOT a module then you can't "un-bind" it i assume (binding was a feature of 1980's SCO - i doubt even a newer redhat is doing it
)
(if your talking about a built-in 'static' kernel module/driver, then your choice is to specify kernel parameters via the boot loader config file. you'd have to see kernel code or docs to know what to do.)
PCI Multiple Driver Binding
