First, google flashplayer_13_sa.exe and download it from somewhere. I would usually suggest downloading it from the Adobe website, but I honestly couldn't find it there. Second, go to http://en.tankiwiki.com/Running_Tanki_Online_using_Standalone_Flash_Player. Just get the links from there and enjoy. The links from the original forum post DO NOT work, so use the wiki. Third, enjoy. This eliminated my FPS spikes and lag completely. I do, however, suggest closing the browser when you're using this - it makes quite a difference in FPS to me.