Hm, not sure how something like this would really work, not on the UI level but in terms of the console architecture.
I'd have to see a sample use case to have a better idea of the ultimate goal, but even then I don't think it could be supported without adding this as a feature to the engine itself, which would slow the whole thing down.
That and not including it in the .xp format would be kind of annoying (loses it's long-term value...), but adding complexity to the format isn't something I'd want to do, either. We'll see what happens in the future--a feature like this would be beyond a lot of other higher priorities at the moment (which are all themselves still sitting behind the highest priority: finishing Cogmind xD).