Imageready comes with photoshop if i remember correctly . And im pretty sure you should be able to download a trial version of photoshop at the adobe website. As for other programs , im not really sure, ive heard people mention a program called gimp, ive never tried it though so im not sure what your able to do with it.
Heres your sig ty2d2 , im still trying to get the "rugged white edges" away from the top of R2's head , but no luck so far 
