of course not! why would you rename the 'Local Handle Variables'. it is preety annoying and lately i have seen A LOT of guys who use Handling systems based on handle vars just with changed names. And i am preety sure that they dont know even how it works.they just renamed the functions . . .
Oki,just wondered,cause i learned about those functions really long time ago from Vexorian as the names "Attach...."(he still uses those),and lately learned that they were an original idea by KaTTana.Anyway,won't take much time to replace all those names.To be honest,i know what this functions do and i can tell u detailed anytime u want.
There is no rule that prevent you from changing them, but I think people that change them are idiots that just want to make confusion, so please don't do it.
(Note that Vexorian is an exception, because his cache engine has more options, and he wanted the caster system to be easy to import, so he changed the names of the original functions to avoid trouble. But if you don't have a seriouse reason for renaming them, I would suggest that you don't do it).