The N64 (and really, any console after that which utilised 3D) renders sprites in a way that you can't just take a screenshot and expect it to be clean. This means you'll need to use a texture-ripping program to get the sprites. The process is pretty long and complicated, too.
You can look and ask here for additional advice as to how to go about this.
So as for those sheets, they both lack a lot of sprites, and are unusable in their current state. Can't be accepted I'm afraid.
Specs 'n' Headphones has been revamped! Check it, yo.
Thanks to Pik and Solink; they are sexy people. <3