Quote: "The drive from the laptop was used in an HP with an AMD Processor and graphics chip, and the computer I plugged it into was Intel based."
The CPUs, GPUs have nothing to do with the hard drive so you don't have to worry there. Now, about the data recovery...
Have you tried connecting it to a machine running Ubuntu Linux? That's what I do for all my maintenance, recovery or ...*cough*... nothing, meow. But on a serious note, it may help. Linux isn't limited the way windows is with file-systems and hidden folders/paritions. In fact my OEM's hidden partition is readable in Linux and bootable in GRUB but Windows shows it as an unknown file system, lol.
That aside, you can always look for recovery software. I dunno if there's anything decent for free on the windows platform but have a look at softpedia, sourceforge and the like.
Hope this helps