How to install the latest Flex SDK into Flex builder 3

Installing the latest flex SDK into flex builder 3 is pretty simple. after you download the new version of SDK from Adobe website, then unzip that zip file and copy the content to a new folder created on a location
like C:\Program Files\Adobe\Flex Builder 3\sdks or any location you like, But I prefer that location.
From the main menu, select Window > Preferences > Flex > Installed SDKs and click Add to add a your new sdk and you can select the default SDK you want Flex builder to use to compile your program.
Cheers!