Convert this C#.NET Framework 4.0 project to 2.0 (REMOVE LINQ)

This should be a fairly easy and quick project for anyone who knows LINQ. Take the attached project which is a well written registry editor written in C# for .NET 4.0 and simply port it to .NET Framework 2.0 code. I believe the only thing that needs to be replaced is the LINQ functionality. Simply replace the functions for LINQ with a .NET 2.0 compatible code that does not negatively effect the performance by much. If there are other namespaces being called for 4.0, they will need to be replaced as well. The project must completely compile under native 2.0 .NET framework Only bid on the project if you are familiar enough with LINQ and .NET 4 to replace the code.