No.
Follow the instructions as written. (Of course, if they could be
improved, feel free to suggest changes.) If it says to do
something weird and unusual like:
-- -------------- !!!!!!!!! EXECUTE IN CTXSYS SCHEMA !!!!!!!!!!! --------------------
-- Notes: Run this script only once for a database, not per ACS Installation.
-- Errors can be ignore if this is not the first time the script was run
-- under the ctxsys schema.
then do that. Otherwise, don't do anything weird, do the normal thing
- which is to always use your one OpenACS Oracle user.