I've seen alot of shopping carts in my day (to many to list...) and whilst they say don't judge a book by it's cover if you don't already have one I would recommend getting a kickass design to default it with, god knows some free scripts have HORRIBLE default skins. We programmers make things work and do cool things but the designers catch the user's attention.

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"What everyone seems to forget is that while knowledge certainly is something - it's the implementation of knowledge that brings power" - Andres Galindo.