I’ve just dug up a script that I wrote a while back for someone. It’s not the most advanced thing in the world and it does what it says on the tin.
Within Zen Cart there is a menu on the admin pages called ‘Tools’ which has an option called ‘Email Welcome’. This script is a default Zen Cart page to simply show you what the welcome email looks like.

hint: be sure to turn on html emails and it will show you both the html and text versions (default text only is set)
I have modified this script to allow the editing of these pages if you have little or no knowledge of writing PHP although some HTML skill is required.
Zen Cart puts together a number of PHP Defines to build the welcome email and normally when you want to modify it then you have to trawl through three of four files of these defines to get to the one you want.
This script basically does that for you and parses/updates the files necessary with your new information. The following image shows the new page and i’m sure no explanation is needed to show you how to use it.
Known Bugs: the only thing I know to be wrong with it is that some defnes reference other defines and this script doesn’t respect that. There are only one or two defines like this so nothing to worry about unless you intend to change the name of the shop owner frequently. If you do change it, however, then just make sure you use this system to update the welcome email at the same time. Nice and easy!
Welcome Email Editor for ZenCart V1.1 (3.52 KB)