Ok, I got to do some testing today and these are MY conclusions. These are MY very unscientific opinions, and MINE (probablly) alone.
Microsoft's Reclean; On the first run it cleaned a huge amount of things from my registry. On subsequent runs, not as much, but the files where the same size and appeared to have the same information in them. My conclusion is Regclean would be OK to run once in awhile, but offers nothing if ran too often. It's cleaning parts of the registry that XP replaces almost immediately. I'll keep it, but won't mess with running it more often that every other month or so. If I find another registry cleaner that will get some of the few entry's that it does clean, I'll not use it at all... Kind of figured that might be the case, as old as the thing is.
TweakNow RegCleaner Std; I was not very impressed. Small and simple is about the best I could give it. Better than nothing, and it is free. I'll keep it, it might eventually find something the others don't.
Regseeker; Holy Moly Batman! This thing will clean your finger nails! Be careful! I made a restore point and had to use it... twice! It's very powerful, simple and straight forward, but has NO help or read me to give you any hints on how to use it.
1. The green should be OK to delete (but a lot are not) and the red needs heavy consideration.
2. It's easier to restore the reg entry by just going directly to the back up folder in the Regseeker folder, where it's installed, and merging from there. The back up from the program itself, opens the reg files up, but I couldn't figure how to merge them from there.
3. To select a group, hold down the "CTRL" key while you select with your mouse.
This baby does a lot and is worth keeping, and studying. You sure don't want to get in a hurry with this one. It'll bite ya!
JV16 powertools 1.3(188.8.131.52); The last free version from these folks. This is a NICE tool. Worth getting. It's possibly my favorite. Not as powerful maybe as Regseeker, but dang close, and a mite more user friendly.
CCleaner; A good companion to any registry cleaner. quick and easy. I did it full blown and removed everything it does and didn't hurt a thing. I had to redo some settings, but I have it adjusted now to just give me a good over all cleaning. Like it's called, a Crap Cleaner!
Easy Cleaner; I've got it downloaded but I haven't used it yet. I used it's predecessor with Millennium and I liked it, so I expect to like this newer version... It has a couple of useful features, I'm sure it will fir in nicely.
That's enough registry cleaners for me, I'm out of disc space.