try applying this action to your button:
[font=Courier New]on ([color=seagreen]release[/color]) {geturl ("[color=red]c:\WINNT\explorer.exe", “_blank[/color]”);[/font]
[font=Courier New]}[/font]
if you don’t use \, flash will truncate the code like this: c:\INNT\xplorer.exe", "_blank - this obviously will not go anywhere.
You should use WINNT or WINDOWS depending on where your root directory is located.
If you just try to launch this from a regular browser or inside flash, it will prompt like your trying to download a file. Thankfully, there is no prompting when the flash page is set as the active desktop.
Hope this helps