Well, I don't know about Photoshop.
*pokes own tummy*
My tech situation is destined for the Embarrassing thread, I use Paint.
I have the name of a program written down at work (I will try and remember) which is powerful but not too fiddly!
Then you could download that Aarrr Shiver Me Timbers Me Hearties!
*pokes hearties*
I basically draw, take a photo and crop or resize with paint.
I did do some correctinos on one pic (the headless one, but paintfully slow)