First, thanks for the attention, Dave. I tried uuzipping the hedden.zip file and then put the whole Folder to the boot drive's root ( with Applications, Library, System, Users and there threee Alias folders together), then after restarted twice, nothing happened
Fare enough, unless you have some other ideas, I prepare to settle down with this mirror problem. Will these Alias just be anoying but have no harm to my PowerBook? If that is the case, I'd better get along with it. Hopefully you can fix it at next major release. Thanks million.