Omg that's great! A little frogger map! See now I can relate and plan my strategy to get from A to B safely!!
Your better off jumping the bus and going to Walmart for the beer. It is very easy and the bus is marked in large letters on the windshield with #2 and WALMART. The driver will tell you when to get off. It is 5 minutes. We always forget something and run to get snacks and stuff. I go everytime. Walk out the front to the right and you will see the bus stop. The ride is 8.5 pesos. Give him a dollar and he will give you change.
Walmart very simple to get to. R-1 and R-2 (I think). Driver indeed shouts out when you get to the Walmart stop, then you cross the road, walk 1 minute down the street, cross another road and you're there. Can't miss it. I reduced my luggage weight dramatically by getting a lot of stuff in Walmart, meaning there was more room for theme night stuff! Shop across the road is alright for say a red bull or something, but wouldn't rely on it for all your stuff as it's still really overpriced.