If you can edit your picture down to less than 50K, you should be able to 'attach file.' With my particular OS & interface, 'attach file' browse-->point to where I've stored my pictures.
I use Irfanview to resize my pictures to less than 50K. I can't get Irfanview to tell me what my picture sizes are; takes some iteration, but 640x480 or 500x300 usually works. (My digital camera has a native resolution which results in 1.2 MB jpegs...)