Excellent. Just what I was hoping for. :-)
If not immediately obvious to you, when using the austpost.vcsweb.com server you are only getting the 'fixed price' quotations (prepaid satchels, etc). When using the drc.edeliver server you are only getting the variable rate items (parcel post).
Normal operation is for the austpost.vcsweb.com server perform a redirect for the parcel post calculations, and apparently your host/server is restricting this action.
You can get around this rather easily.
Firstly, modifying the same file as before, put the
SERVER = line back to how it was (http://austpost.vcsweb.com).
Next: Scroll down about a page until you see a rather large block of code commented out.
Either immediately before or immediately after this block (not really important) add another line of code to redefine the server to be used.
Namely, a copy of the currently modified line.
In short, you'll end up with two "SERVER =" definition lines.
The 1st pointing to vcsweb.com (for the prepaid satchels, insurance rates, etc), the second pointing to the drc.edeliver server for the costings.
Cheers
Rod