Ribbon Sharepoint Urls

forums paths about rebbon
http://social.technet.microsoft.com/Forums/en-US/sharepoint2010customization/thread/01ec5ed6-e733-44ac-a365-d8193aa58bf4
establishing css  paths
http://erikswenson.blogspot.com/2010/01/sharepoint-2010-css-references-in.html

http://msdn.microsoft.com/en-us/library/ms438349.aspx
http://erikswenson.blogspot.com/2010/01/sharepoint-2010-base-css-classes.html

architecture of server ribbon
http://msdn.microsoft.com/en-us/library/ee537017.aspx

core url for ribbon
http://msdn.microsoft.com/en-us/library/ee539395.aspx

add rebbon to master page
http://msdn.microsoft.com/en-us/library/ee539981.aspx