mkrznaric

i have this chip:
[Only Registered Users Can See Links. Click Here To Register]
and i wish to update my wii to firmware 4.0.
i have never updated my chip's firmware, so it is still on whatever it came with, so can i do this, and if so, how do i do it? thanks

Edit: I want fw 4.0 coz i need the SD channel thing coz i only have like 200 blocks free on my wii, and i have deleted most of my wiiware/VC's/gamesaves and wish to use them off my SD card