My older brushes were created in Photoshop 7 and are compatible with all versions upward (PS7, CS, CS2, CS3).
In the future, brushes will be created in Photoshop CS3 Extended and you will need CS3 (or up) to open them. Please don't ask me to convert them, because even if I wanted to, I can't, because I don't have PS 7 any more.
The Photoshop Version the brushes were created in can be found in the artists comment as well as a link to the image pack, if one exists.
How to install, use, create brushes: [link]
What you can do:
use my stock anywhere you like, on and off dA, for whatever you like (including webdesign, manips, references and in a journalistic fashion to illustrate an article) commercially or non-commercially as long as you:
a) Credit me with a link to this account!
b) Show me what you've done (if you're not a dA Member you can e-mail me at kuschelirmel<at>googlemail.com)
What you can't do:
No redistribution as stock or photography in its own right, meaning: no upload to the stock or photography gallery and no giving away my stock anywhere the way it is. Not on Stock CDs (including for magazins), not uploaded to stock sites, not on a personal basis via your website or instant messenger. If you want people to get my stock, send them here so they can download it!
No "stock from stock". No premade backgrounds, no brushes.
My full rules can be found here