Can Not Install Flash

I have a Power Mac G4 with 10.5.8

I was trying to install the latest version of Flash Player and it did not work.

I used uninstaller,then downloaded - install_flash_player_10_osx.dmg.- Everything went fine until the end. I got a - The following install step failed:run postflight script for plug in.

Then I downloaded - flashplayer10_1r102_64_ub_mac.dmg - opened it,right clicked on it and went to "Show Contents" then "Resources" and tried installing - Adobe Flash Player.pkg. I got a - You cannot install PlugIn on this volume. A newer version of this software already exists on this volume. Even though I used uninstall to get rid of all Flash beforehand.

So now any website that need flash player I can not use.I have looked all over this web site for an answer.Please help me get flash player reinstalled,the lattest version if possible.