Tables prefix

Hi,

I want install, if possible, the table of the database with a prefix.
Before run
" % script/setup_database production "
I had modify some file for try:
db/schema.rb
db/development_structure.sql
db/migrate/001_create_radiant_tables.rb

No errors but no prefix.

Someone did it or can help me?
And, if possible, why any errors?

Many thanks to the core team for having conceived and put radiant in the wild.

+1