Modify Zen Cart Import Script

I have an import script that grabs my suppliers datafeed and imports it into Zen Cart, but it manipulated the Categories wrong. The supplier datafeed gives categories like: "categ1,categ2,categ3" and the import script treats those categories like categ2 and categ3 are subcategories, so it imports the product to categ1>categ2>categ3 When really those categories should not be associated like that. The product SHOULD be added to a category: categ1 AND linked to categ2 AND linked to categ3. Please let me know any questions you have. This should be a relatively simple change to a script. You are NOT building an entire import script from scratch, it is already built for you and just needs modified.