So just to let me understand correctly, you have a wizardflow consisting of several pages?
Your first page will need to have an object as a page parameter, which you can then pass from the current/previous page to the next page.
If you've already selected a customer on a previous page, and thereby associated it with your page parameter, you can show that customer in a dataview over the association on the next page.
ps.
Another way to build a wizard quickly is to use just one page with conditional visibility in combination with an enumeration for the wizardsteps.