I have suggested similar suggestion here. This is another one, perhaps easier to implement.
Command line parameter(s):
-runslide <D:\Pictures\FolderA\Image1.jpg>
...to run the slide show with the image1.jpg, then show all images in FolderA (then perhaps go to D:\Pictures\FolderB...)
or:
-runslide <D:\Pictures\>
...to run the slide show with all images in the folder D:\Pictures\ and its subfolders
Perhaps also with options (as additional parameters), for example:
-runslide t8 window800x600 random loop notitle <D:\Pictures\>
It would be similar to quick slide show.
Hmm... I'm not sure if this would be easier to implement, perhaps the other way would be better, just a single option - path instead of the file list, but there is no reply there.
I need this because I want to run slideshow always with the new, updated images. When I create the .sld file, then add the new images, I have to (re)create the new .sld file manually each time. This is very annoying.