Word 2002 – Selecting Styles

I need to modify a number of documents (different ones to my last question!) in which I need to change the font throughout the document. This time, each document contains five or six Styles, one of which is the Normal Style and, in each one of the Styles, a font is specified, not just related back to the Normal Style. (It is Palatino) I wish to change that font to Times New Roman in every Style in use in the documents. Is there a way to automate this?