Wow, 90% of the english speaking americans can't spell or have as good of grammar as you, and you're from portugal and you're 12. There's even spell checker options on these BB's usually. Go figure.
but I think that's way more suitable than a demo. The demo will take more time and effort to setup. I'd be happy with 10 minutes of rolling through a part of the map and a fueling stop maybe, a little bit of weather effects and cab view too. good idea.