copy shopping cart script from one site to three other sites

I would like to copy my shopping cart php script from [[login to view URL]][1] to [[login to view URL]][2] , [login to view URL] and nicaisseorganics.com. The script is really straight forward. It doesn't use a mysql database, it emails all orders directly and reads an excel file that i upload for discount codes, etc. Once the script is copied, the worker must test to make sure it functions exactly the way it functions on the site it was copied from.