I have a Sony Vaio PCV-RS420 Pentium 4 Processor 512MB PC-2700 DDR/120GB Hard Drive i.Link (iEEE 1374) interface. I have a Compaq Presario 54300NX that died. I need step by step help to put the hard drive from the Compaq into the Sony so I can retrieve the data and pictures. I'm a beginner so that is why I need step by step instructions.