Hi -- if you mean Vizrender (the only form of Viz that links to ADT2004 files), why would you want to bring the model into Revit to render? To my taste, Accurender's results are not as pretty as Viz family renderings, but they are good. If the model remains in ADT, you can link to Vizrender with one click.
If you don't want to recreate the model in Revit for some other reason, why go through the extra work? You can work from scratch in Revit next time. Am I missing something? If so, sorry.
Bob
PS-- I was told last March at an Autodesk roadshow that removing the "bought in" Accurender and replacing it with Autodesk's own product was slated for Revit 6. In the meantime, it turned out that Accurender was too deeply embedded to replace so quickly. I would expect that work continues on that, but have not heard more.