How do I develop a workflow for creating an XSL ePortfolio template inside Sakai and OSP?

This is a two-step process. First you'll need to get your hands on the XML that you'll be creating your XSL for (you do this by creating a pass-through template so you'll have the resulting XML to work with) Second, you can develop the XSL and your XPATH expressions on your local computer with minimal fuss.