Besides the fact that this is probably great work, I really wonder who
will have enough time and skills to review such a huge patch... :-S

In any case, some recommendations:
- please provide patches against trunk; there is no way such big changes
will get committed against 2.6, which is in maintenance mode
- avoid, as far as possible, doing changes in style, whitespace or
indentation; this will make the patch slightly smaller or cleaner
- avoid C++-style comments (use /* ... */ instead)
- don't hesitate to add extensive comments and documentation about what
you've added

Once you think your patch is ready, you may post it to
http://codereview.appspot.com/, in the hope that it makes reviewing easier.