OpenCart v1.4.0

[OSWorX]

for the invoice numbers. if i make the orders editable and let people enter their own invoice number will that be acceptable?

I am asking myself what for we are discussing here and you are asking something completely different ?
http://forum.opencart.com/viewtopic.php?f=10&t=7767&hilit=invoice+number&start=60
There is all said about the invoice numbers.

[i2Paq]

As this topic is about 1.4.0 I have moved the questions about the Australia Post Module to a separate topic and moved that to the Module Support forum.
It is called: [1.4.1-dev] Australia Post module.