In theory 5.2 is supposed to remove the need for the registry tweak. Although I am guessing that means when a view session is established.
Here is some odd findings re 3DMark 06 v1.02.
When I run the benchmark through the console I can complete all of the tests and I get a 3DMark score of 11580 w/ the registry key set (it was like 7580 w/o the reg key).
When I try to run the benchmark through a view session, I get the same device lost error. I'm guessing it is due to a crappy video drive by VMware.