Just tick the "show your signature" box in the bottom right corner of the quick reply window or under your post in the advanced reply window everytime before you post to show it
You have to tick the box with every post to show the sig. Yours seems to be too big, though. As much as I like Veronika myself, maximum size is 575x100 pixels.
There's another program called the Gimp. I've never used it, but it's free software that's largely comparable to photoshop. I know several people who use it and like it.