I don’t think so, I suspect that the screenshot folder is a fixed smart folder. You could make one yourself by setting the file name, kind and dimensions (i.e. screen resolution) as parameters and then create a folder action with Automator to import your screenshots to that album. You could do this by creating an “Automatically Add to Photos” folder in your pictures folder (like for iTunes) and attach the folder action to it. Then you simply use the command given by tedson and use that folder as your drop folder.
