What you really should be doing is maintaining the list in a format that is suitable for mailmerges, perhaps in an application such as Excel, although a Word table could also be used. You could then use Word's mailmerge tools to filter the list, either on the basis of using SKIPIF fields to skip over records in which a designated field is used to indicate whether a particular record is to be included, or by directly filtering the records in Word. For basic mailmerge procedures, see:
http://office.microsoft.com/en-us/wo...101857701.aspx
http://office.microsoft.com/en-us/wo...001034920.aspx
http://word.mvps.org/FAQs/MailMerge/...AMailMerge.htm