Short version of my question: Is there a way for a chapter number to appear
on the same line with the title in the TOC but be treated separately on the
chapter title page and the page header?

Long version: I'm trying to re-create a Framemaker format that uses chapter
numbers independently of the chapter titles. On the chapter's first page, the
number is much larger and on the preceding line. I can imitate this using a
line-break, but the number stays on its own line when it's reproduced by a
STYLEREF field in the page header. Also, the chapter number appears
separately in the page header, a large number in a circle. But the number is
on the same line with the title in the TOC.

Any help appreciated.