lol i know what happened. For those who dont know what he's talking about:
you have to take out ALL perimeter screws to get the top case off, which allows access to the HD. This is only for the MBP. To re-install the top case, you have to put the screws back. If you're not careful you can mistake the DVI port screws for the top case ones. as mentioned earlier, the service manual specifically warns the tech not to do this. It is NOT as simple as unscrewing it, or using a magnet (without case modification). The screw is smaller in diameter and doesnt grab the threads. It also actually gets stuck behind the outer case.
A tech at work did the same thing. I had to pick up where he left offf...
My manager said he used a drill bit to gently bore the casing around the screws to make them wider, and easier to pull out with a magnet, etc.
OR
you dont have to bore the holes and instead, remove the Logic board. Since you've already done the HD, the logic board requires removal/moving of the right speaker, superdrive, heatsink, fans, and related connectors. as well as the screws (for first gen macbook pro at least). If you do this route, make sure you have alcohol prep pads and a tube of thermal paste (try some arctic silver

). Hey, at least you can get lower temps now.

It was good practice for me. I had never worked on a macbook pro until that day (worked on plenty of macbooks though). I actually think the top case is easier to get off than the macbook's.
edit: and keep your work area organized. A lot of different length screws and types. I suggest getting an ice tray (what apple manual suggests.

) and post-it notes to label which screws are for what part. Never had an extra/missing screw since.
and dont be too hard on yourself. A few people at work admitted doing the same thing. Also, that is why Apple had to include that little tid bit.
