MrMeech,
I am using zen cart 1.3.8a. Order Delivery Date is v2 and this is the only version I ever installed on my zen cart installation. Besides, I merged changes with Gift Wrap modified files using WinMerge.
I just went through all the changes again, particularly admin/includes/classes/order.php and catalog/includes/classes/order.php.
The Gift Wrap module adds only a couple of entries to admin/includes/classes/order.php. So it wasn't difficult to merge.
The catalog/includes/classes/order.php, however, has a lot of modifications. Like I said, I used WinMerge to carefully merge changes. I am attaching three versions of catalog/includes/classes/order.php here. One from stock zen cart installation, second after installing Gift Wrap and third after installing Order Delivery Date. Maybe that'll help troubleshoot.
I'll look through all the file changes I made tomorrow morning and will post any new findings.
Thanks again,
Vab
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