Why would you want to integrate the Wyzz editor into Zen Cart?
The popular open-source Zen Cart eCommerce package comes as standard with plain-text editing of product descriptions, but with the HTMLArea WYSIWYG editor included in the download and available for selection via the admin area (Configuration > My Store > HTML Editor). There is also a good deal of information about integrating the TinyMCE and FCKEditor (now CKEditor) into Zen Cart. So why integrate Wyzz?
TinyMCE and CKEditor are, without doubt, impressive and extremely capable editors. However they are correspondingly large. For many users who simply want to offer some limited product editing for their store owners, these editors are hugely over-specified.
Wyzz, on the other hand, is light, configures easily into Zen Cart, and is extremely easy to configure with just the required wysiwyg editing tools. Here's how to install Wyzz on a vanilla Zen Cart 1.3.8 store (this uses a special version of Wyzz, 0.65ZC, included in the download).