The phrase "Flash Player" is a bit confusing.

There are several different things that are "Flash Player"

1) the Flash Player ActiveX control that lets you play SWF files in Internet Explorer (or other ActiveX enabled applications

2) the Flash Player plugin that lest you play SWF file in Netscape browsers

3) the authplay.dll that is the flash player when testing within Flash itself (only used in Flash)

4) the standalone Flash Player which is an application that plays SWF files. This is what SWiSH uses when you say "Test in Player", and is also what is used if you double-click on a SWF file from Windows Explorer to open it.

If you have Flash itself, then you should have all of the above. If not, you can download them (other than authplay.dll which is only used internally be Flash itself)

Even if you have Flash Player install from macromedia, that will really only give you 1) and 2) above.

The standalone Flash Player is a separate download (it didn't even used to be downloadable).

Find it here:

http://www.macromedia.com/support/flash/downloads.html
NOTE: The link given earlier by LiasA is for the Flash Player ActiveX control and Plugin ( 1) and 2) above) .. not for the standalong player.