[Tex]

Regardless of copyrights, if you're just using them for a personal website it really doesn't matter. I have several personal websites and I've always created banners with images from google searching -- that's what billions of sites and blogs do. Worst case scenario is that you're asked to remove them, but you're more likely to get struck by lightning. There's no RIAA for images who are hell bent on ruining people's lives.

Now if you were running a registered business, then you may want to be more careful.