Boy, what terrible pix.
But I think the first problem I noticed was that the normal (probably mini-IDE) connector on the hard drive is being obscured by an adapter which needs to be removed and added to the new drive.
The second issue is disk capacity. You probablky need to be less ambitious and look for a drive under 80gigs -- you may have to buy secondhand.
I'd start by going to a computer store and taking the existing drive with you. Any decent dealer will spot what I think I have observed and solve the problem.