Sometimes i forget how much i hate linux and then something like this comes along that reminds me exactly why.
I regret installing a 64bit version of linux on my machine. A mistake that i shall never commit again as long as i live!
I found this nice little blog on how to do it http://kbala.com/2009/03/install-adobe-flex-builder-linux-alpha-in-ubuntu/ but it turns out that flex needs a 32 bit version of everything.
So at the moment i am suspending the installation until i stop fuming over the situation.