I've learned something new: to use a tilde over the "n" in Spanish, all you have to do, in Windows, is write [& ntilde] without the brackets and without the space between the ampersand and the word.There is a handy chart for Mac, Windows, & html, for other accent marks at http://desktoppub.about.com/compute/desktoppub/library/weekly/naccents.htm or, if you prefer, here.
All the best,
kat