2). Manufacturer cups are the only way (one of 3 ways, actually) that you'lll get to race Rome Nite without slapping in the Arcade disc..
http://www.formulanone.org/gt2/info/faq.htm
Where's Autumn Ring Mini, Rome Night, and Motorsports Land? These three tracks are all on the Arcade Disk only (Rome Night sometimes appears in races where randomly-selected tracks can appear). You can force them all to appear in Sim Mode if you want to use a GameShark.
You're right, but can you imagine what will it be to make let's say 4laps in a stock Midget II around GVS?The only critcism I had of EG races is that they're not long enough. 2 laps? There should be longer ones than this.