For those who have a Surface RT or a Windows RT device, there is an unofficial tool available that will allow you to white-list a web site so you can display Flash content via your Metro browser. Simply download this tool and install it, and you will have the ability to update the Default Whitelist.
A forum member over at Neowin.net has created a small tool that allows you to easily add websites to the Default Whitelist. All you have to do is follow the on-screen commands and you can get up and running in no time. This tool will allow you to view Flash content on your Windows RT browser.