I've got a 2010 MacBook Pro and I am able to run BT4 without any
problem using VMware, but for forensic reasons, I would rather run
it as a live DVD or off of a thumb drive.

I've burned the BT4 .iso to a DVD and I'm able to get to a command
prompt, but startx won't work. I modify the xorg.conf to something
reasonable, but I just can't get the display to work.

Using rEFIt, my MBP flat out refuses to boot off of a BT4 USB key
that I created.

Has anybody with an MBP successfully booted directly into BT4?