How to Install Flash Player 9 Beta in Flock
For those of you interested in viewing Flash 9 content in Flock, you'll need to copy over a single file from a Mozilla installation... Currently the Flash 9 beta installer doesn't install the plugin into the Flock browser. To get it working, simply copy C:\Program Files\Mozilla Firefox\plugins\NPSWF32.dll to C:\Program Files\Flock\flock\plugins\NPSWF32.dll.
Note: This is obviously not supported from Adobe. I urge you to back up your
C:\Program Files\Flock\flock\plugins\NPSWF32.dll before copying over the new
version, so you can revert back to it if this doesn't work for you.
Thanks to http://blogs.adobe.com/mikepotter/2006/06/install_flash_p.html for this how-to.