I dont know anything about the internals of zen cart, if it depends on
javascript it may not work.
Next you are going to want to start with the html that zen cart
creates, you will have to modify all of the html templates to make
them valid xml. If you can get past this stuff then you should start
seeing pages appear, the css might be messed up because of your
changes and specific css styles that the framework doesn't support.
But you can tweek this until it looks good and everything should work
as long as there is no problems with https.
There are a lot of hoops that you will have to jump through to get
this working. The current state of Wrapper is not complete enough to
render anything that you send at it. But if you want to try make sure
you install the debug flash player and it will give you errors when
something is not right and keep sending messages to the list if you
get stuck and I or other people on the mailing list will help you do
it. I have setup shopping carts before in different versions of this
system but it was all custom made to work with this system in mind.
-Tyler