The white background makes me sad. How can I get rid of it?
And if you know how this is done, read on:
1. you change the white color that you want to get rid of to one that is not on your image yet (probably a very bright green or turquoise)
2. with a dedicated paint program (like Paint Shop Pro or Photoshop) you can say that this particular color is the transparent one
3. save as .gif or .png (these two support transparency)
Well, that's it already:D
(There are some other ways, of course, but that's how I'd do that)