Scott,
I'm almost ready to declare defeat!
I downloaded your full image and marked all the potential satellites and numbered them (including hot pixels). Starting from Optus B3, I tried several combinations, but things don't give a good correlation for me... I even loaded the image into OziExplorer and calibrated it as a map with AZM = long and Elev = lat (north).
I'm not sure if the problem is that I've updated the TLEs in Orbitron... I'm not sure how well the TLEs extrapolate backwards

. Anyway it has been an interesting exercise, and in case anyone else would like to have a go I've uploaded your image with my arrows and numbers on it to the upload area:
http://www.iceinspace.com.au/uploads/optusbig copy.jpg
I hope that's OK?
For the sake of comparison, here's my best guess of which satellite is which:
1. Optus B3
2. JCSAT 4
3. IntelSat 602
16. Optus B1
18. Hellas Sat 1 (DFS 3)
4,5,6,7,8,14, 15, 17, 26, 27, 29. Hot pixels
It's overcast and drizzly here so this is me mowing the lawn!
Al.