[How to Help] - PS3 HDD Upgrade...

So I have a PS3 and I have read about how to upgrade a HDD in the darn thing but I cant seem to get it to work. Anyone care to share their experiences and guide me through? (I already know how to get the Hard Drive removed and replaced though)

This is cause I have a really good WD AV HDD that I want to put it my PS3 and it would give a huge performance boost overall. I also need the storage being a PSN-Plus member, ya know with all the free DL games n all this week/weekend.

This has eluded me for some time now and I seem to be at an impasse.