Action Batch Script - Photoshop CS4 (Windows version)

I'm a sporting club photographer and would like a Photoshop CS4 Action Script to make life a bit easier than a repetitious task over and over again. I need an end product (JPG image) that is 3600pix (width) x 2400pix (high) at 300dpi. This image will be a portrait photo of a subject (person) that consists of 1 @ 1800pix (width) x 2400pix (high) set to the left half of the frame and then the right half of the frame consists of 4 @ 900pix x 1200pix (high). All at 300dpi and fit perfectly / evenly on the final product (image) with no overlap. The final product is to be saved at Photoshop maximum quality (12). The Action is to also batch all original images, one at a time, until all done within the source folder. The final image is to be named as per the original input image. The original input image will be set at 1800pix x 2400pix. A PSD output file is not required for each JPG; but is ok if it makes things easier. See sample end product attached. ## Deliverables Sample output of file (JPG image)