Well what the guy mentions in the video is that you need to have memory reservation on the vm that has vmdp devices assigned, equal to the vRAM configured, otherwise it will give you an error on power on.
This is a well known prerequisite to run a VM that uses VMDP devices.
Our porblems with the 2GB limtitation begin well after that.
The problem is well described on the first posts of the thread.
I wish a vmware representative come to this thread and give us his lights!