http://office.microsoft.com/assistan...MailMerge.aspx
http://www.mvps.org/word/FAQs/MailMe...AMailMerge.htm
These are two articles that can help because I'm not sure I would explain it with enough clarity. But usually I use Microsoft Word. And this is an example of how I do it. I have a list of 10 names and addresses in one word document. In another word document I have a letter where it says name and address up top and when i mail merge, then it takes each of the names and addresses, plugs them into the letter, and creates 10 personalized letters. Tell me if you need anymore help, but check out those links
-Rudey