This an improve version of "To slice and merge images" you can split your images in any number of rows and columns and join them again later.
- The splitted images have an Alpha Channel (transparency)
- The images names have sequential numbers (image1, image2...)
- The resultant images don't have the previus extension in their names
- The files aren't overwrited anymore
Thanks to "Anonymous" for the Alpha Channel and Giuseppe Conte
The aplication is installed in Filters->ATG