If anyone's interested, here's a video i did up of a hike up to Caroline Hut (Mt Cook) and then over Ball Pass.
Part 1 - http://www.youtube.com/watch?v=Cnr4JlYqIE8
Part 2 - http://www.youtube.com/watch?v=4c_NPQqTPIw
We also did some ice climbing on Fox Glacier: http://www.youtube.com/watch?v=gPYuLcIPKfM
If anyone wants more details on the trip let me know.