I just draw a dotted line in PostScript, in a "print field" inserted into Word. You do have to us a PostScript printer though.

As an example, in a new 8.5 x 11 document - paste ALL of the following, including quotes, in after you "Insert" - "Field" - "options" - "\p page" - "add to field" and "ok" twice:

"
0 setgray
432 setlinewidth
[2 8 2 8 2 8 2 8 2 45]0 setdash
300 80 moveto
300 660 lineto
stroke "

It should look like:

{ PRINT \p page \* MERGEFORMAT "
0 setgray
432 setlinewidth
[2 8 2 8 2 8 2 8 2 45]0 setdash
300 80 moveto
300 660 lineto
stroke"}

inside the "[ ]" the "2s" set the line weight, the "8s" set the spacing between lines, and the "45" is the gap between staves.

The 300 is the distance from the edge of the paper to the center.
80 is the distance from bottom of page.
660 is the distance from the bottom of the page to where the stuff stops. (Stop in a blank spot, and the precise distance isn't critical.)
All "dimensions" in points. One point = 1/72 inch.

If you print to a PostScript printer, you should get a passable sheet. Adjust as needed.

John