Would anyone recommend re-creating NEW projects and re-adding source, and why?

Question

We have a large SQL driven software system which has been around since Delphi 1. It uses the same original project files in all of its various projects. We've recently begun upgrading to Delphi XE2, and I've been contemplating the idea of creating NEW project files and re-adding all the source again - to make sure they get the recommended defaults of a new Delphi XE2 project.

Would anyone recommend this? And what are the risks? Obviously it's a difficult task, re-defining version number, project names/description/company info, etc. But it's the size of the original projects that scares me. 3 main executables plus many others, totaling in probably close to 3 million lines of code all together.

The main reason I'm thinking of doing this is because I've seen how new Delphi XE2 projects automatically create sub-directories per platform and release (Win32, Win64, Debug, Release, etc.). Our projects are currently a mess and I've been trying to clean it up.

So what would you say the risks are in this? And why or why not is this a good idea? Could there be some alternative to "Reset" the defaults?