Downloaded Sphax and registered it as a texture pack and when I tried to open a world it repeatedly crashed

Put the summary of the bug you're having here
Cannot open Minecraft 1.7.4 due to downloading Sphax
What I expected to happen was...: The texture pack to integrate with minecraft so as to change the textures
Describe what you thought should happen here
That it should run smoothly and open when required
What actually happened was...: repeatedly crashing when I try to open the program
Describe what happened here

Steps to Reproduce:
1. Put a step by step guide on how to trigger the bug here
2. ...
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