Hi Travis,
Have you considered using the C/ODBC interface - that’s the ODBC driver to access NAV’s native database?
As another comment, then I surely will suggest that you upgrade if not the whole application, then at least the “engine”. That’s all the executables etc. This you can do without changing any objects and would give you access to use a much newer version of SQL Server. Of course it requires that your company at one point had or have a maintenance agreement. If you don’t have it anymore, then you will be able to get the version available up until the point the maintenance was canceled. Moving the “engine” from 2.60 to e.g. NAV 4.00 SP3 would not take a lot of time, and the client would even be able to run on newer versions of windows!