As firescue17 pointed out you could follow the post he referred to. This may even alleviate some of the issues that MiRai had with the state of the dxNothing window.
It may even give you some ideas of you own about how you would prefer to set it up for your style.
However, the general steps as I see it are:
1. Add the dxNothing process to Innerspace as a game (
http://isboxer.com/wiki/DxNothing)
2. Add a new slot to your character set, and put the dxNothing character in it.
3. Add a window region to you window layout for the location of the dxNothing character, which will house the mini maps. This will need to be in a different swap group (for sizing purposes), Always On Top = Off (in fact I think you need all the regions to be Off). Set this as the home region for the slot that has the dxNothing character.
4. Create the videoFX sources and viewers (plenty of guides on using the ISBoxer in game GUI
http://www.youtube.com/watch?v=73ATj87X ... r_embedded or via mapped keys as per the post firescue17 referred to
viewtopic.php?f=35&t=3695)
5. Create a Mapped Key to toggle the Foreground/Background state of the Slot that is the dxNothing character, with a Window State Action. If you make this a 2 stepper with a "press OR release" execution, then it should be that the dxNothing will appear when you press and hold the hotkey and drop off when you let it go again.
That's about it as far as the general steps go.
There may be a few extra little details needed for when you switch back to your current main in order to make sure the focus is right (which is probably why having pop up viewers may be better than a dxNothing). I vaguely recall some discussion on this in the chatroom.
As I don't have 4 D3 accounts, I can't really give you a D3 specific step by step guide sadly, despite the need for some income