North Bridge Aftermarket Cooler?????

It's fairly straight forward I believe, not too different from a normal HSF. With your board its just some springy push pins holding it on. Loosen those off. Some north-bridges rely on sticky thermal tape / paste to hold them on. I believe with the pins you could just use a mild application of AS 5 or other good quality TIM (using too much could have this stuff squeezed onto the motherboard... you don't want that) under the aftermarket cooler, then fasten the cooler into the north-bridge with the pins if it has them, otherwise you need the sticky thermal tape / paste.
Take this with a grain of salt, as I haven't done it personally.

Try checking out the thermalright hr-05 ifx (or sli/fix) and add your own 80mm fan on it..

Where does that even go on the mobo below the cpu one??? and how does it hold on i cant find any videos on it or anything.

personally iv had my eye on the alaska stuff
http://www.maplin.co.uk/Module.aspx?ModuleNo=46819

or for a less fancy looking job
http://www.maplin.co.uk/Module.aspx?ModuleNo=351567

both are easy to find online, just google chipset cooling.