Replace a para tag throughout book?

[Nancy Allison]

Hi, everyone. I've been asked to increase the point size of my callouts, 
which I have created as a paragraph tag.

Because I cannot live an easy life (and because I am trying to create 
the perfect template), I have decided not to simply increase the point 
size of the current paragraph tag, Callout_Regular. Instead, I have 
created a new tag, Callout_Large. Seems reasonable to have two callout 
tags.

I know I can open each file of my 22-chapter book and use Global Replace 
to change all the Callout-Regulars to Callout-Larges, but Frame won't 
let me do it at the book level. How do I do it? Copy Special? Some 
wondrous plug-in? Thanks.

--Nancy