Concerning the old instruction our tech staff will answer later.
Dear Community!
We understand that many of You want to have an instruction fore several MNs with just one .dat file. It is not a matter that we can't or don't want to make one. Past experience has shown that such a construction was not working stable for MNs. That's why a proper one needs time for tests. And our tech team is very busy now with other priority work. But we will come beck to this issue in January.
Thank You for Your understanding.
Actually such a instruction has been written by me above...) You can just add my post to old manual written "by @darklion84 (and part from busminer)"
I can tell you that my several MN run from 1 wallet dat and this fact never caused problems with stability.