Yeah, it'd make it illegal anyway making it work again since it'd be the same as cracking the program to make it always useable.
So I'm afraid we can't even talk about that on this forum.
I know that you could get a free version of photoshop on some cd's that came with magazines a while ago. Even though it was an old version, it might be useful. It was free because it was probably dropped being that it was so old. i think it was version 3 or something, and you may be able to find somewhere to download it.
I'll try and search.
ADOBE PHOTOSHOP ELEMENTS:
You could try Adobe Photoshop Elements though which contains alot of the features of Photoshop and is alot cheaper if you were to go for it after trying. This also comes with a 30 day trial, so you'll be able to use this instead while it lasts: