I may not have posed my question very well in the subject line, so
here's what I'm trying to do.

Let's say I have an area of text in a document (Word 2003) that I want
to find, but it may not be the same every time.  Here's and example of
a couple possible areas of text.

Area 1:
aaaaa
bbbbb
ccccc
zzzzz

Area 2:
aaaaa
mmmmm
nnnnn
zzzzz

As you can see in both areas, "aaaaa" will always start it and "zzzzz"
will always end it.  What I would like to do is set up my macro to
find the entire section from a to z.  Once selected, my macro will
type in some new text.  There is no special formatting I have to worry
about and there are no tables or pictures in the area I'm searching
for - just text.  Also, this area will only appear once per document.  
It is very possible, however, that there may be section breaks
somewhere in the middle.  I'm not sure if this would present a
problem.

I'm not new to macros, so the only part I need help with is how to
write it to search these sections from start to end, regardless of
what may be in the middle.  I have everything else covered.

Thank you in advance,
Mike