|So a professional told you the hard drive needed to be replaced? Or are you just trying for more storage space? |
If the drive is compatible and you installed it right you should see it setup in the BIOS (setup) screens and in the POST screens which go by when you first start up the computer. It would appear from your #2 response, that both the hard drive and CD drive are being configured by the the BIOS. So, that leaves the DVD you are using suspect.
Did the CD drive work before the hard drive change out?
Are you trying to install Vista, or something else? What type of disk are you using?
What is the brand and model of the laptop?