Front Row on the Big Screen You have complete control over which display Front Row is used on your Mac.
Front Row will only play on the primary display, which is the one with the menu bar. You can make Front Row play on a big screen TV connected directly to your iMac or through a projector connected via your Macbook. To do this, change your display preferences to move your menu bar to the secondary display and then return it to its normal configuration. It's not very convenient, but it is.
Front Row on the Big Screen solves all of that. Run it and choose the display Front Row should use. Front Row will now use the display you have selected, without having to move your menu bar. You can then close Front Row and continue using your Mac as though nothing has ever happened.