"I connected it to an older macbook via firewire and booted the diskwarrior cd holding down C."
I could be wrong here, but I don't see where using DiskWarrior (a utility designed to rebuild drive directories) could be of optimum use in tryng to scavenge data from a drive in a dead computer. DW is directory-repair software; it's not "file-recovery" software.
I think you need different software tools. Perhaps some hardware, as well (see below).
Does the drive (in the non-working MacBook) mount up properly on the desktop of your working MacBook when you connect via firewire target disk mode? (I am assuming yes).
If that's the case you should try to "clone" the contents of the drive to another drive somewhere. Doing this will make it much easier to pick through them for the folders/files you want to save.
Can the drive (in the non-working MacBook) be removed from the case without too much trouble? This is BY FAR the easiest way to go about it.
Suggestion (assuming you can take the drive out):
Get one of these gadgets:
http://www.amazon.com/dp/B00APP6694...=2025&creative=165953&creativeASIN=B00APP6694
or this one:
http://www.amazon.com/Plugable-Dock...=2025&creative=165953&creativeASIN=B003UI62AG
Then, take the "bare" drive and put it into the dock, connect the dock to your working MacBook via USB. It should "mount up" on the desktop and you can then get what you need from it….