Data sync from different SQL Server versions databases So I have a SQL Server 7.0 database that can not be upgraded. it is only allowed to have data read and written in it.
I created a SQL Server 2008 R2 database which is the same structure. I want to synchronize the data between both so whatever happens on the SS7.0 happens in the SS2008 R2, and vice versa, is there a way to do so? 
I'm not asking for a ready answer, I just want a trail to follow, tips and such. So far I only managed to export a copy of the data with bcp, but I can't do it each time
You can find a lot of articles about MS-SQL Server 7.0 replication in Technet and MSDN.

Two-Way Replication with SQL Server 7.0

Microsoft SQL Server 7.0 Replication Made Easy

Replication for Microsoft SQL Server Version 7.0