Excellent information! I'm now at the stage of experimenting with various types of files/loading/unloading deleting and finding Shareware/Add-ons or Utility programs that round off the Mac experience.
I'm still having issues with Mac .rar, I can't seem to figure out how it works once I've downloaded it. I also tried a Dvix download but wasn't having any luck with it either, however using VLC seems to have corrected that little snafu.
Stuffit works for .rar files. I think there is a link in the guide, if not just google Stuffit.