Do you really need Flash Player 8 as its a very old version?
Still, if you need it, you can check the below link.
Hope that Helps.
Moving this discussion to the Installing Flash Player forum.
Why would you want such an outdated plugin? The latest version is 11.2 and you can get it at http://get.adobe.com/flashplayer/
If you need more help, please specify your operating system, version & edition, as well as your web browser.