Quote Originally Posted by dbltoe View Post
The mod itself and the directions say to overwrite with the file and that would remove the newer _construct().

@twitchtoo Any success on this mod?
When updating a mod that was written for an earlier version of zen cart I do a 3 way compare: the file in the mod, the file in the version of zc for which the mod was written, and the file in the new version of zc to which I want to upgrade. As a rule of thumb I ignore changes that were only between the two zen cart versions, and I make only the changes that the mod made in the earlier version. This doesn't always work for me if the mod files were dramatically altered, and in particular, if the changes to core files were not highlighted. In the case of Canada Post mod each and every change to the original file set was clearly identified within each file so it was easy to work with.

Basically, I merge ALL files and overwrite none. Otherwise, you end up with old core files mixed in with new core files.