I'm not sure if there's a better thread to post this on, but I'm new to Zen Cart and to the forums here, so please forgive me if it should go elsewhere...
We ship a lot of light/small items (CDs mostly) that can usually go Lettermail if they are in small quantities. After playing around with the zone and table modules, I realized that it would be much easier just to modify the Canada Post module to include the rate tables for Lettermail. I have uploaded my modifications to the page with the Canada Post module.
You will need to uninstall the module from your system, and then replace the includes/modules/shipping/canadapost.php file with the new one before re-installing everything. My changes use the Canada Post server to determine if the package size is suitable for Lettermail, but since Canada Post does not currently quote Lettermail rates, you will have to manually confirm the shipping rates in the control panel. I have included the current rates as of the last increase (i.e. Jan 2008).
I have cleaned up some of the code to make it a bit more efficient, but most of it is as I found it. There is likely more that could be done with this module (particularly with respect to the packaging information that Canada Post calculates) but I have decided to leave it alone now that it does what I need.
Please let me know if you have any questions about it...


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I would be eternally grateful! This is the only issue I'm having with the entire setup.
