difftool, open all diff files immediately, not in serial

The default git diff behavior is to open each diff file in serial (wait for previous file to be closed before opening next file).

I'm looking for a way to open all the files at once - in BeyondCompare for example this would open all the files in tabs within the same BC window.

This would make it easier to review a complex set of changes; flick back and forwards between the diff files and ignore unimportant files.

Here's my same question on StackOverflow with a couple of ideas I have found (copy files to temp dir and do folder diff, Araxis has 'nowait' option): http://stackoverflow.com/questions/1220309

--Seba