LINQ To SQL Transactions Through Network

I want a sample project built. Must be with Visual Basic with the .net framework 3.5 service pack 1 with visual studio 2008 service pack 1. What is needed are the following. 2 Data Context classes. Can use the northwind database. The reason for 2 is because I need to support transactions (so if the submitchanges on one is successful but not on the second; then the first changes will be rolled back afterall. Must work even when accessing it from a network. I am able to get something working when only the local computer is accessing it. However; must work even from networked computers. ## Deliverables The sample exe to show transactions working on networked computers. Must work on buyers environment. If you need to connect to my PC; then must use Team Viewer since I am behind a firewall and the only program that bypasses firewalls is that one. ## Platform Windows 2003 Server Edition.