Easiest way is create a .SVG file with Adobe Illustrator or Inkscape that's about 16.5KB or less, then use the "import SVG" function in the DBC 17 logo editor on PC. Usually I do a logo for the front face, back (or 2 if needed), and edges. Then its a case of lining the logos up in the bat manager.
As an alternative (if you can get it to work), is import an image overlay into the logo editor, then trace shapes to make the logo. It's very picky what images it uses. Usually they have to be really big, because the overlay has a tendencey to scale them down or not show them at all.