Attached Link: Laptop HDD - Desktop IDE adaptor

About the only thing "salvageable" from the laptop would be the hard drive.... The adapter in my link will allow you to plug the hard drive into your desktop machine.

The optical drive could probably be used but the "shadyness" of it (unless you customise the case to hold the drive) isnt really worth possibly electrocuting yourself....  Laptop parts are largely specialist parts and wont work in a desktop unit, So the HDD is the only thing usable....

You could probably sell the battery and powerpack on ebay, someone might want them !