Vector Groups

[ggaliens]

There are many ways to get this done.

You can use wings plugin state. You could use vertex colors if your didn't think those already occupied.

You could use gb_sets if the values are somewhat transient/volatile in memory.

And I think there is an offical way to do it with vertex attribute lookup. I think see how colors and uvs are stored per vertex and do the same for your properties and SAVE/LOAD might be free of charge.