EPiServer 4.50 includes a portal that can consume WSRP portlets for WSRP producers.  Portlets are similar to SharePoint webparts - areas on a single screen that provide access to information and interaction from a range of web applications simulltaneously. A portlet could provide access to your order process and inventory system as part of a customer or supplier extranet for example.

Add a WSRP Producer under Admin mode and enter names and 4 URLs. In this installation you can use the built-in WSRP Producer by stating the following four URLs. (Change the word "site" with the name of your site.)

Test this via the Test button. If it doesn't work, run the URLs manually in a browser.