Transformation packs like this are for 'newbies' who don't really know or care to customize their own PCs. Personally, doing everything manually with a Visual Style or IP is much easier, not to mention safer. Anything that modifies that many critical system files is pretty dangerous.
SilentPCReview.com has a good number of articles pertaining to that kind of performance v. noise stuff. I don't quite remember but the Barracudas are very well like on that site. I myself have an older IDE WD drive that runs on ball bearings - the constant whine is the loudest part of my computer.