Can a Mac expert help me install something from Adobe"?

I was able to download Adobe Flash Player 9 and now have the icon “Install Flash Player 9 OX” on my desk top. When I click on it, I get this: “Please close all Browsers before beginning installation.” MY browser is closed. And I have 4 GB available for the 9512k needed. It is for the little app. that PaulC has added to Fluther. (See the Collective Creates, on right, under News.)