What do modprobe.conf!

I don’t understand file modprobe.conf, what to do?

install wctdm /sbin/modprobe --ignore-install wctdm opermode=AUSTRALIA fxshonormode=1 boostringer=1 && /sbin/ztcfg
install snd-intel8x0 /sbin/modprobe --ignore-install snd-intel8x0 && /usr/sbin/alsactl restore >/dev/null 2>&1 || :
remove snd-intel8x0 { /usr/sbin/alsactl store >/dev/null 2>&1 || : ; }; /sbin/modprobe -r --ignore-remove snd-intel8x0
alias usb-controller ehci-hcd
alias usb-controller1 uhci-hcd

wctdm opermode=AUSTRALIA ??? what is?
Is it release with zone and tone for zone?
Please help me!