A small but annoying thing about Mac OSX is that sometimes it doesn't refresh itself when a file or folder is changed - mostly when dealing with networked (especially SMB/Windows) share drives.
Microsoft Windows users can hit F5 to refresh the current Window, but Apple chose to not add this feature to Mac OSX.
Mac OSX 10.5.x "Leopard" may not need this - however some users have reported it still adds value. Apple seem to have made some changes in the way Leopard interacts with the file system making automatic refreshes far more instant.
1. Unzip to your Applications Folder *
2. Open a Finder window.
3. Go to Applications and scroll to "Finder Refresh"
4. Left-click & drag Finder Refresh to the Finder window toolbar - you should see the other icons spread out.
5. Let go of the mouse button and there you go.
* If your web browser auto-unzips (i.e. Safari) then "Finder Refresh" will be in your download directory so you can skip Step 1 From then on just click the button to refresh the currently open Finder window.
To Remove from the Finder Window, Hold down the Command/Apple key, left click on the icon and drag off the Finder Window - you'll see your mouse cursor turn into a cloud, at this point let go of your mouse button. Done!