I know a lot about TEW and have played the demo for TEW 2005. There are a couple of issues though. I won't be buying the 2005 version because the 2007 version is out in December. The other is that I don't think there is a way of converting the save games to the new game. The problem being that, for example, in EWR there is a "speed" stat. In TEW it is split into "aerial" and "flashiness".
As much as I would like to, for the realism, features and additions, convert this to TEW 2007 when it comes out, I'm not sure it would be possible without a restart of the story.