Guys i was wondering if i can use Zen CArt to build a virtual mall, where to ship items from each store there is a separate delivery charge..

Secondly, is it possible to import product data from an oscommerce web site ?

Thirdly is there a dreamweaver plugin/extension i can use to control the layout of a zen cart site ?

Fourly is it difficult to program a custom payment gateway into zen cart ?

i hope my questions arent dumb ones..

any advice will be greatly appericated.