How to change Publisher name from 8-digit string to my company name?

Question

My company reserved a Publisher GUID, and we found the Publisher in package name is in 8-digit just like Cock Tail Flow "08C8076A.CocktailFlow", and it looks like given by Microsoft and not changeable in account setting.  However we also found some company's app has different variations in Publisher, for example "32226FrostyNixon.SlapDashPodcasts", "AMZNMobileLLC.KindleforWindows8", so we tend to use readable company name instead. Is there any method to change the Publisher field in package name? Thanks in advance.