"Can i flash this bios without having hard-drives installed etc?"
yes
You should be able to flash it just with CPU/HSF, gfx, memory, floppy & PSU plugged in.
I've only got B02 as I'm not using RAID.
I'm sure that Richh or someone else can PM it to you if I can't dig up the link shortly.
http://www.rarhost.com/download-lf3l9c.html but server currently down
try
http://putstuff.putfile.com/51265/3377026
oh & to answer an earlier question the QuadGT is currently the better overclocker with a quad core running into the mid 400s stably.
There are still some minor niggles to do with power management & multis on quads but it's still very early in terms of BIOS development for the board.