1) Honestly not sure, dont think there will be one in the near future
2) Not sure about official release, maybe ask that on the GR2006 forums
3) FDR- yes it is the only horse racing game for xbox that I know of. Once again have a look on the FDR forum for more information
4)- Not sure- is your disk scratched?
5) ??

haha sorry for not being able to help that much
welcome tho :D