Replacing a hard drive in a Compaq Presario 5008US

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The hard disk is inside the metal enclosure next to the motherboard. Look for a SATA cable plugged into the motherboard at one end, and the other end into the hard drive. It will also have a SATA power connector that looks like this (black end) - http://www.google.com/products/catalog?q=SATA+power+connector&hl=en&rlz=1G1GGLQ_ENUS359&prmd=imvns&bav=on.2,or.r_gc.r_pw.,cf.osb&biw=1399&bih=734&um=1&ie=UTF-8&tbm=shop&cid=9242125162945707990&sa=X&ei=iOqgTt3iCaHW0QH80PyVBQ&ved=0CHkQ8wIwAA