The problem I'm getting is - it seems to create the xml file, but it's empty. So even if I re upload the images and thumbs, I have an empty xml file. Of course, every time I try to generate the xml and thumbs it deletes the images. It's like I'm going in circles.
reg and tn seems to be the default. So I've tried changing it to images and thumbs, then I generate the files. I've also tried leaving the reg and tn alone - - no luck.
But back to my original question about generating my own images and thumbs folder and xml file - maybe a code would be written so the plugin would recognize it and display it via svgallery=folder call. Unfortunately, I'm not good enough with php.