Just replace the old chip with the new one, thats it.
Just BE SURE to install with the notch at the top in the same direction as the one you are replacing.
And as with any electronic type things, just make be careful when pulling the old chip and putting the new one in, not to gouge the board or bend any pins and you will be fine.....simple stuff.
You'd have to change the bios back. :smt020 That's why I have more than one motherboard. I have one with just a Japan BIOS for those games that need it. :smt020
For the moment all my games (only 3 so far and one Japanese game on its way) work with the Jap. bios so it's not that big a deal. It's really only the ingame instructions that are in Japanese anyway.