Can't you just use phtoshop, or even Irfanview (I do not know whether ACDSee is able to do it) to compress your picture ?

That is, remove blank space, resize the pic a bit, and maybe decrease the quality.

EDIT : I just resized the file (still 1280 * 900 or something like that) and removed empty space, and the file is 136k (instead of 850)

Hum... how on earth do you get a file attached ?