Watch folders - can i set multiple outputs (on diff portions of the source)?

Hi - I have a comp that is 5760 wide x 1080 deep (basically 4 x screen side by side to make a video banner).

When I render, I need to render each of the four screens separately - which I can do fine in the queue by adjusting the source left and right positions, then rendering, then readjusting the left and right to the next region for acreen 2 etc etc.  I know that I can set multiple outputs for a watch folder and hoped that I'd be able to set it so that when I drop the comp in, it would render each of the 4 regions ... but although I can see the way to adjust the output settings for each output type, I can't get to the source settings in order to select the left and right position.  Is this possible?

Thanks

Steve