How to upgrade a long running SharePoint Workflow already in production

Question

I have been tasked with helping the deployment of a Phase 2 of a previous SharePoint deployment.

The original deployment has custom workflows that have been updated i

Answer 1

I think you already read Chris O'brien's comments on this topic. so here is the second link : http://msmvps.com/blogs/theproblemsolver/archive/2008/09/10/versioning-long-running-workfows.aspx