OK, so, it's been a while since I've said... anything. (6 months, roughly...)
I'm sure some have noticed that my latest brush sets don't work in Photoshop 7 (And maybe even CS).
Why? There's a lot of reasons, but the clearest way to say it is that I don't support Photoshop 7 any longer.
Image packs have been released through my website alongside brushes which are noted to have problems with older versions of Photoshop. (If you have CS2 or newer, you will probably not encounter a problem.)
You can view those brushes here: Downloads @ Nagareboshi
(Image packs may also have materials not present in the original brush set -- so they're a good deal for downloading!)