If you search all files in the add-on for the words 'package' 'function' and 'datablock' you could get the names and deactivate/overwrite/delete them. That part is easy. The hard part is if the add-on uses those words in any place other than package, function, and datablock definitions.
Only issues I see is with functions that the add-on completely rewrites, instead of just packaging, as well as weapons/vehicles/lights/emitters/ still being in the list, although I think those lists could just be resent.