Well right now it looks as though we might have an update for RED 5 with enhanced support for Sony Vegas Pro 10d a little later on this week. I'd suggest checking back with our web site over the next few of days for the update.
The Vegas forum has a posting about Boris5.02 -- but the link goes to a Boris "Trial Download" page. Far'sI can tell, there's no specific information on the Boris FX website about the 5.02 update.
I'm going to guess that I should update my Red5 by downloading the "Trial" version of 5.02 -- if that's correct, then if I want 5.02 to be available inside of Vegas10d, do I need to uninstall 5.0 before installing 5.02?