""how to mount my two hard drives in the housing they provide"""
the bays under where the floppy sits are the same as in any other case - in the lower ones, the drives mount vertically - remove it using the thumbscrews, bolt the drives in and re-fit - this is the location best for hot-drives like 7200RPM Barracudas as they`re right in front of the twin intake fans , normal 5400RPM ones will be fine in the bays under the floppy and won`t get in the way of the case cooling - one tip, the intake fans are very slow AddAs, run them on fastest speed, they`re still quiet
"""I can`t figure out how to properly hook up the cables for the hard drive""
I don`t understand what you mean here - IDE and powert light cables hook up the same in any type of case..
"""and the four usb plugins"""
they are for extra USB ports your board may have, you`ll have to check the motherboard`s manual for the pin-outs, they DON'T replicate the ones on the ATX Backplane.. Some motherboards have 6 USB PORT capability, and you get to use all 6 with the LianLi - if you have only 4-port capability (as is usual) you just use one pair of the front ports..