[Solved] Python site-packages not loading

I'm trying to use an opencv interface I've built for a robot, in my breve simulation. When I try and have my breve simulation load it I get an error:

Traceback (most recent call last):
File "/Users/bbarr/Code/breve/div3_simulation/graybump.py", line 3, in ?
import vision
ImportError: No module named vision
An error occurred while executing the file "/Users/bbarr/Code/breve/div3_simulation/graybump.py"

Is there a simple fix around this? I'm using a mac and the site-packages are located in /Library/Python/2.5/site-packages.

Thanks in advance!