PMT 2.54 can save files into any other file(called Mother File).If you select a 24-bit-colored BITMAP image or JPEG image or Flash SWF file as a Mother File,then PMT can insert files into the Mother File,or append files to the Mother File.It won't make any difference to the quality of the Mother File. You can save your important files into a Mother File and set a password to protect them.Meanwhile, You can open or run the files in the Mother File freely and create directories in Mother File.Pls be noted the maximum size of a BMP file is 1600x1200x24bits ,so 2M bytes' room can be used by other files.