So i can't use the likes of isoboxer to over lay other clients local, but i can just use windows tiled to have main screen taking up 80% of the screen and two more clients stacked behind just with there local showing? maybe not as tidy but does the same job.

Also can the overlay appear in another screen that has no client, or other empty desktop space as then its not an overlay correct?

When there isn't a single post in this thread supporting this overlay change, its probably a good indicator that you dun goofed.

What makes you think its 'apparently' banned?

Using windows mode is not banned.

However, if any third party application or other software is used to gain any unfair advantage, or for purposes beyond its intended use, or if the application or other software violates other parts of the EULA, we may fully enforce our rights to prohibit such use, including player bans.

We do consider overlays using elements of a second or multiple other EVE clients to be against the rules. It changes the way the game is played and grants the player unfair advantages over other players. For example, having overviews from other EVE clients as overlays on one EVE client would allow a player to get real time intel from all those other game instances without having to switch to the other windows. Similarly, overlays using elements from a second or multiple other EVE clients to allow the player to activate modules etc. on those other game instances without switching to the other client windows are clearly in violation of our rules.

See this? This is the kind of **** that shouldn't be possible in EVE, it allows one player to control 11 Algos' in PVP simultaneously, allowing for outcomes that shouldn't be possible.