Can't. I've got ie7 at work and that's all I'm allowed.
There is one advantage though - on the occasion I'm called to do a bit of internal web development I only have to make it work in ie7, I don't have to make a site to work in ie7 then do a different version for every other browser 
I suppose the answer is "stop slacking and get on with some work instead of farting around on the web" 