In addition to ProductView Express you can also try Pro/Desktop Express. ProductView Express is limited to a very small window of your web browser. Pro/D allows much more interigation of the model and mark-up capability. However, Pro/D won't handle family tables.
I my opinion PTC is neglgent in not providing a decnet viewer. Compared to what's offered by Cadkey, SolidWorks and AutoCAD the viewer choices for Pro/E aren't worth a damn. I usually have to resort to exporting the models in either a CAD neutral format like STEP that can be read into another system or saving an image in JPEG, PostScript of PDF.
Bernie Hayden
XKL LLC