是不是這個功能 http://windowshelp.microsoft.com/wi...y/together.mspx ???

Synchronizing multiple versions of files
When you work in a team situation, multiple versions of a document can lead to confusion. Office Word 2007 works with Windows Vista to minimize conflicts among multiple drafts or versions of a document. From the Ribbon in Office Word 2007, you can use the Review panel to compare or merge multiple documents.
Use the Review panel to merge, compare, and combine different versions of an Office Word 2007 document