Genghis, I use the Epson R800 printer and 3170 Photo Perfection scanner.The procedure is going to be largely the same, and it is both fiddly and time consuming. Make sure that you have a very full box of teabags.
For my own scans, I don't use the bundled Epson idiotware with the scanner and use Silverfast AI which gives far more control and quality. I recommend you to have a look at it as with the time that it takes to get ANY scan into your machine, you may as well get the best quality that you can. (and it IS excellent)
I have to be honest - I am not sure if there is a version of Silverfast for the R500 if it is a combined device, but if there is, then as I say, it is well worth a look
Conan