I would highly recommend Applejack. But I think it can only be installed on the boot drive. Also ClamXav would not hurt - we live in dark times, and is getting darker, even for macs :)
Try searching sourceforge.net. And for the last resort, learn using OpenFirmware. It is very powerful and also extensible. The same goes for the Intel Macs - install rEFIt, along with the EFI shell, and learn how to use EFI shell as well. Try to find utilities which can be invoked from the OpenFirmware. Myself, I have never done that, but I am sure that it can be done and that such utilities exist. As for the pure troubleshooting utilities, I would recommend Apple Hardware Test, or some other LiveCD which has those utilities preinstalled. Depending solely on your hdd and utilities on it can be dangerous. I hope I have been of little help. Matevž Markovič -- You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to g3-5-list@googlegroups.com For more options, visit this group at http://groups.google.com/group/g3-5-list