I'm actually looking to do something similar with Northern Brewer's Munich LME. A brewpub in my area used to brew a beer called "Munich Dark Ale." It was basically a Munich Dunkel fermented with ale yeast. They would periodically brew it as a lager, and I always felt the ale version tasted better.
I'm thinking of brewing a partial mash version of that beer. 2-3 pounds of Munich malt with some Carafa II thrown in, a can of Munich LME, 1-2 oz of hallertau hops, and a clean English ale yeast like Nottingham or S-04.