[Zope] Bi-directional update of Data.fs

Hi, At the moment I am in a situation where I am working for a company overseas across the Internet. Because of the lag between us and the fact that I am working over a modem we have chosen both to have a copy of the Data.fs files and when I complete a project (or at the end of the day) I export the files I have modified. The only problem is at the end of a hard day of working remembering which files I have changed. What would be a better solution is somesort of syncronisation between both copies of our Data.fs files so I can see the updates they have made and they can see the updates I have made at the end of each day. Is this possible and how can I do it? Thanks all, Brenton Bills.