You're gonna need to be a bit more specific than just 'free photo shop images'. Technically, there's no such thing as a 'photoshop image'. There are images..of all sorts but 'photoshop' isn't really a type of image. PSD is photoshop's layered format, but you still need some type of content to be looking for. So what is it that you need?
Well, one good resource for stock images (is that what you need?) would be Deviant Art. Although not everything is free, there are a lot of images you can use with the permission of their owners, for free. Another one would be Flikr. You just have to mark the "Only search within Creative Commons licensed content" and "Find content to use commercially" options. Hope it helps, I guess this is what you were asking for.
I use sxc.hu when I need some kind of image for Photoshop editing. From what I've been told the images are free for personal use, but you have to buy them for commercial use. Please right me if I'm wrong.
You can easily get free renders from planetrenders.com, that's where I go. They usually have every render I need, but if they don't then I just make a render.
Hello buddy, yes you can get from the above but some do charge. Google is your friend like freak46 mentioned but "Warning" you need to go to the advance search options and select the "for commercial use with modification" box as this covers your urrmmm "end". take care buddy and if you need some tuts let me know. take care.