I need to set up a page with a centers heading on the top, then two short
columns, then a centers line and two more short columns under that. How can
I do this in Word 2007?
At each place where the number of columns changes (from one to two, or from two
to one), you need a continuous section break. If you type most or all the text
before you format the columns, and you select some text and change its number of
columns, Word will automatically insert those section breaks for you. Otherwise,
you can insert them yourself from the ribbon, at Page Layout > Page Setup >
Breaks.
Read the "Multicolumn sections in single-column documents" section in
http://www.word.mvps.org/FAQs/Formatting/HeadingsSpanColumns.htm for more
details.