I guess your scenario is similar to this one: /help/talk/topic/the-same-wap-multiple-times-in-1-zone/ – there are several hints on how this can be accomplished with the current version of NetSpot. Anyway, we are considering a special survey mode, something like incremental survey, where you would be able to virtualize APs and their positions in the area with only one (or several) real AP. This feature will be based on current snapshots and joining them together selectively.