Here's Bradsul's recipe,
http://www.homebrewtalk.com/f59/brads-vienna-lager-80356/
BUT I don't think Vienna malt comes in an extract. That would be the major difficulty in doing it as an extract. I did it as a double decoction mash, using only Vienna malt. I don't think it can be converted to extract, but probably can be done as a partial mash with some Vienna malt. It won't be exactly the same, since the extract won't be Vienna, but it might be acceptable.
The lagering schedule would be critical- Dos Equis is a lager, and lager yeast and a fermentation at about 50 degrees is a big part of it.