Only in a very limited way. Adobe Contribute is a sophisticated HTML editor and makes no claims to be more than that. If it did, Adobe wouldn't need Dreamweaver in its product rosta.
But Zen Cart is a dynamic PHP-driven application, with very little content held in HTML files.
So even if you get this working, and that should be fairly straightforward, there's hardly anything in a Zen Cart to which you could apply it.
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