No. The module that your link points to is very old (by internet standards) and is unlikely to work with the latest versions of zencart.
The most current module for you to be using is this one (ozpost)
http://www.zen-cart.com/index.php?ma...oducts_id=1286
The "Austpost Improved" module
http://www.zen-cart.com/index.php?ma...roducts_id=471
Will also work well with the latest zencart versions, but it has a few minor 'annoyances' that you may or may not want to live with (especially in regards to the icons).
The 'ozpost' module has been totally re-written in order to take care of many of the inefficiencies of the quotation methods utilised in both the "Austpost" modules. However, this makes it a 'first release' code, which means that it hasn't had much in the way of 'real world' testing.
Cheers
RodG
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