He listened to George's explanation, already trying to figure out ways that he could possibly help. Everything was a little more difficult without Dumbledore and Sirius around to give direction to his thoughts.
"First you'll need to figure out something that identifies in a reliable manner the security measures in place and then you'll have to know the counter-charms or counter-hexes to these to silence any alarms that might go off. Then, if it's a magical location - one that's hidden from the Muggles, I mean - it will have some form of making charm in it that you could, in theory, tap into with the use of the 'map'. Since every single thing in the building will have to be masked by this magic, the correct complimentary magic should very well be able to identify all the limits and figures inside. Not names, of course, but you'll have an idea of where people are located. And there is the possibility of creating charms that each member of our side could carry that could identify them by a second color or by name on the map itself so we can tell our side from theirs. It sounds complicated, but when you break it down into individual steps, is shouldn't be. I would start with creating the map itself and then figuring out how to bypass the security measures. Test it on the safe-houses or... wherever we decide to re-establish headquarters."
He shrugged, then. "I think it's a good idea, personally. And they could be personalized so that each one could only be activated and used by one person - like fingerprint recognition." It was easier to stay on this subject than to waver about it again. But he kept drinking and so he kept talking.
"Sirius, when we were younger, was always in some state of intoxication. So he had an unfair advantage. Or disadvantage. And in more recent years there wasn't the same sort of fun between us so I never attempted. He mostly drank alone. But," Remus said, accepting the shot with a nod, "it's much better to drink with company, I think. Even if I think you're trying to get an old man hammered so you can ask him to tell you embarrassing stories. But a stand by what I said," he added pointedly, "there are quite a few contributing factors there and you have already gotten me well on my way to a couple of them. Now, on with the flattery and you'll have the rest."