Is it possible to generate combined letter headings for an index in Word? Basically, instead of:

W
===
widgets, 2-4

X
===
xylophones, 7-9

Z
===
zippers, 5


I'd like to generate:

W-Z
===
widgets, 2-4
xylophones, 7-9
zippers, 5


I've checked Word's help files and a manual or two, but no dice. Thoughts? Opinions?

Arianna