NUnit 2.4.* to NUnit 2.5.* migration / Rhino.Mocks

NUnit 2.5 has changed quite substantially compared with the previous 2.4.8 release, as outlined in the NUnit 2.5 release notes. 
The problems that I had when migrating tests to NUnit 2.5 were:

• Assert.IsInstanceOfType has been replaced by Assert.IsInstanceOf
• NUnit.Framework.SyntaxHelpers namespace no longer exists. All classes that were in this namespace have been moved to the NUnit.Framework namespace
• Many alias conflicts if using Rhino.Mocks
  using RIs = Rhino.Mocks.Constraints.Is;
  using NIs = NUnit.Framework.Is;
  using RProperty = Rhino.Mocks.Constraints.Property;
  using NProperty = NUnit.Framework.Property;
  using RAssert = NUnit.Framework.Assert;
  using NAssert = NUnit.Framework.Assert;
  using NList = NUnit.Framework.List;
  using RList = Rhino.Mocks.Constraints.List;
• Has.Length(2); has been replaced by Has.Length.EqualTo(2));
• Has.Count(1); has been replaced by Has.Count.EqualTo(1);
• Has.Property("Length", 20) has been replaced by Has.Property("Length")
• Error 243 Warning as Error: 'NUnit.Framework.Text' is obsolete: 'Use Is class for string constraints'

Good luck migrating