Glad you enjoy them. I like to organize my most commonly used brush types in my tool presets for easy access. I have a ton of brush presets, but try to keep my tool presets list small. I do need to do an update on these though.
I'll do what I can but I don't think CS five presets are backwards compatible. I may be able to save some of the settings out as brush files and then you would have to apply them to the smudge brush to make them work.The Brad Rigney smudge brush is just a smudge brush with a hard edge. That one's easy to make. The flat brush is a default chalk brushWith the brush Tip shape roundness being flattened a bit. This allows you to assign pen tilt in shape dynamics in order to get a sharp edge when you tilt the pen perpendicular to the direction of your stroke, and get a wide hedge when you draw the pen and tilt it parallel to your stroke. And it has wet edges, another Brad Rigney thing. The randis renderer brush is real nifty a few ball the link that I put a few responses up you can follow the simple instructions to get it running as long as CS three supports dual brush. And the nice blender is just a nice chaotic scattering texture on the smudge brush with a small range random jitter. Maybe some of these suggestions may help you construct some of these brushes until I can figure out how to make a version of these presets that compatible with earlier versions of Photoshop.
I'll definitely play around with it. I've never been happy with the smudge tool in PS so was curious to see how well they responded. Unfortunately I think it's always going to be too slow for my liking, but it's always good to hope haha.