Here you can find creatures have been hacked. To get these to open, you should right click the image and click save as. Then save them to an easy to access place like your desktop. Then open up Spore or the creature creator in window mode and go to the building creature mode. Then just drag the image file over the spore screen and the creature will load.

To make things easy, here is a  YOUTUBE VIDEO  

Cooptie Bird- youtube

Crazy Eye-youtube

Fat Worm- youtube

Froger- youtube

Humungo

Tegi

 The Hunt- youtube