ubun2^beta

I am using 64bit ubuntu desktop on my machine and my firefox couldn't play youtube or any flash based sites. I can't find a 64bit flash plugin for linux. Maybe somebody would have figured out a solution for this. Please help...

Just downloaded moblin 2.1 image file and thinking of installing it in my ACER aspire one netbook.
 
Since it is .img file i don't know how to burn or flash it into as a bootable USB flash drive so that i can boot my netbook with USB and install moblin. Please help