I think there is a 2004 Magny-Cours by abcdefg, but... you know.
Maybe it would be better to use a 2001/2002 version as base to try out the new layout, and ask authorization to belini to use his layout as a reference.
The Hockenheim and hungaroring tracks are very good, but the cc line of Hockenheim is weird in some turns... is there any way to ask belini's authorizaton and use his tracks and make them playable for old PCs? I don't know how to edit tracks but some people could try it if possible..
The new Hockenheim of the track pack 2002 is very good IMHO. For Hungaroring I recommend the 2003 version by Cesc. Both should work normally with my md's and in debug mode.