I was playing RO today, and I noticed that a few guilds had emblems that were transparent, and that was fine and dandy but... when I checked the official site on creation of guilds and whatnot:

Quote Originally Posted by iRO site
2. Emblems must be 24X24 pixels in BMP format using 256 colors
In Photoshop, transparent PNGs and GIFs were no problem, but JPEGs didn't seem to be too happy about having transparent sections in them. I would have tried this myself, but I don't have Photoshop anymore. Can you make BMPs that include transparent sections, created without Photoshop (if it requires software, something preferably free)?

Every bit of knowledge counts. Thanks in advance.