Hi there, I know you might have found an answer by now, but regarding the black screen issue while rendering:
I had the same issue, I corrected/minimized by going to Options/Preferences/Video and changed rendering threads from 16 to 8. I noticed that this type of problem occurs when I apply too many filters to it.
I use Vegas pro 11, my system; sandbridge 8 processor/ 12ram/ invidia 4G…