Nevermind -- I went through the links to find the MR thread about the package installer. I see that I *do* want to have the extensions and mrpackages folders at the top level. I.E. I want the CONTENTS of what the mac unpacked.
Proceeding.
edit: Done! Added KUAL+, helper, battery app, and KindleLazy. Don't have much I can DO with it till Monday, when my remote controller arrives.