UBB.threads PHP Forum Software Community Forums UBB.threads 6 Version 6 Support Parallel installation of 6.5 Beta?

I'd like to install the 6.5 beta in parallel with my existing installation of 6.4.2 at forums.operationsports.com. I was planning a fresh install in a second directory so that the staff could begin to use it - with both 6.4.2 and 6.5b pointing to the same DB. Then we could transition it over when we felt fully acclimated.

ARe the database changes such that this won't be possible? Will the 6.5b scripts break 6.4.2? Does anyone have experience with this sort of an install?