As others have mentioned, your question would be better asked in a WORD
newsgroup, but, since you're here...
Since you have a scanner, take a sheet of paper, sign your name LARGE
using a medium-point Sharpie or other permanent marker (thicker is
better than thinner for scanning purposes, but not too thick), then
scan it into your pee-cee using whatever image manipulation software
you prefer. Save the image of your signature as a JPEG, and then you
can insert the JPEG into your Office documents wherever you need a
signature. You can repeat this process until the scan you get looks
good to you.
Good luck!