Combining two images like picture package and run it for all the images inside a folder
I have hundreds of jpg photo files in a folder. I want to resize and combine 2 4.5x6 jpg files into one 4x6 jpg file containing 2 photos, each 3x4. Then I can upload them and get them printed by a photo printing service. I can do this by picture package but it takes hours and hours to do it for every couple of image inside a folder. I need to browse for the folder and then the script shall combine every 2 images repeatingly. So if I have 500 images the combined images number shall be 250 totally at the end.
Do you have any other suggestions? Thanks!