Download of Wow Model Viewer can be found hre
WoW Model Viewer
Download of MyWarCraftStudio can be found here
http://media.curse.com/dl2/47/2/515....studio-0-7.zip
If it doesn't work, I would suggest you to look on the forums for both programs, for the model veiwer, here is a adress to the bug section of the forum.
Troubleshooting / Glitches
For the studio... searchBut I'm 99% sure it's something with your graphic card as the error is telling you.