So even my external drive will work since its temporary? OMG u r a lifesaver. I've fixed hundreds of desktops but laptops have always felt so foreign. Thank you so much
Good luck and have fun! SATA connections are SATA connections so you will be good to go.
Now, if the laptop HDD is the IDE (a.k.a PATA) variety, you need an adapter to connect to the typical IDE/PATA cennection used by desktop machines.
Once you pop the HDD out of the laptop, you will know for sure.