The wall you are talking about, is it an external wall? If so, I would be happy to put that screen on a wall mount onto a dot and dab wall. Just make sure you use all of the holes on the mount to be sure it's not going anywhere.
I know it's not quite the same, but I did a floating wall onto dot and dab wall, then put two batons onto the wall and attached the mount to them. I didn't fully try it, but I'm fairly happy it would have supported my weight (not telling - but it's a lot more than a 30ish KG plamsa TV!!!
Also, have a look at Torn's floating wall thread. He mounted a 50" Panny plasma onto dot and dab, but cannot remember exactly how he did it.
lounge and dining room floating walls
Hope to have been of help.
Greg