If you don't want to fully restore the iPad2 with the same image as your iPad1 as I did, you can sync it seperately and as long as its authorized on your account (apple allows 5 authorized systems per account) you have 2 choices. Sync it as a new iPad and choose what apps from iTunes to sync (SlingMedia player would be one), or go to iTunes on the ipad2 and search sling media. The iOS 4.3 version on the ipad 2 will show a button that says "Install" on any apps you currently own on any other device instead of the price. This means you can reinstall it right from iTunes on the iPad with no charge.
Hope that helps.