You built support into the kernel (y), rather than as a module. That's fine if you want it that way, but then you don't need the correpsonding entry in /etc/modprobe.conf.
OK thanks i understand this now - previously i have done a make menuconfig but this time i just edited the .config file as i was advised to do it that way.
Using just the .config if i want to build something as a module rather than into the kernel when it comes to that section of the .config file do i just
CONFIG_FUSION=n
for example?