If the users all use Word 2007 & later, you can use content controls for their data entry. Alternatively, to support all Word versions, you could use formfields, with your document protected for forms. See:
http://office.microsoft.com/en-us/wo...005230270.aspx
http://office.microsoft.com/en-us/wo...010030746.aspx
http://gregmaxey.com/word_tip_pages/repeating_data.html

__________________
Cheers,
Paul Edstein
[Fmr MS MVP - Word]