That should be fine if the products are associated correctly to the category that you want them to be added to.
Is there anything special about the categories that are migrated from PowerStore 2 to PowerStore 3?
Your friends over here at WebAssist! These Dreamweaver extensions will assist you in building unlimited, custom websites.
These out-of-the-box solutions provide you proven, tested applications that can be up and running now. Build a store, a gallery, or a web-based email solution.