Looks like rFactor will have to wait, but if I install it now, the following mods would be added:

• Trucks Series Racing
• Motorcycle/Sidecar/Pocketbike/Campagna T-Rex/Can-Am Spyder Roadster
  
• Lawnmower Racing
• Unliminted Hydroplanes
• American Le Mans Series, FIA GT and various similar racing series
• Pimp My Ride
  
• Panoz Esparantes, like its ALMS GT1, GT2, Street and GTS
• Gallardo Challenge
  
• McLaren F1 Challenge
• Ferrari F430 and its F430 Le Mans
• Aston Martin DBR9 Challenge
• Stinker Cup
• Kantti
• Rolls Royce
• Caterham
  
• All others

In addition, there would be tracks as well such as:

• Lime Rock Park, Lakeville, Conneticut (my favorite track)
• Watkins Glen International, Watkins Glen, New York
  
• RFK Stadium Circuit, Washington DC
• The Car Park
• Castle Combe, Wiltshire, GBR
  
• Rock Island GP Circuit, Rock Island, Illinois
  
• The Graveyard Run
• The Raceway @ Belle Isle, Detroit, Michigan
• Monza National Autodrome, Monza, ITA
• Hockenheimring (pre-2001 circuit), Hockenheim, GER
• Norisring, Nuremburg, GER
• Mallory Park Circuit 1970s, Mallory, GBR
  
• Nurburgring GP circuit (short and long), its Nordschleife aka North Course and it's all-road version, Nurburg, GER
• Varano de'Melegari, Varano, ITA
  
• Maniax Collection (six tracks)
• Talladega Superspeedway (oval only), Talladega, Alabama
  
• Texas Motor Speedway (oval only), Fort Worth, Texas
  
• Road America, Elkhart Lake, Wisconsin
  
• Circuit de la Sarthe and Bugatti (long 24 hours and short courses, respectively), Le Mans, FRA
  
• Tsukuba Circuit, Ibaraki, JPN
• Suzuka Circuit, Mie, JPN
• Fuji Speedway, Mount Fuji, JPN
• Iron and Snow Mountain, Australia
• VIRginia International Raceway (Grand Course East only), Alton, Virginia
• Iowa Speedway, Newton, Iowa
• Indianapolis Motor Speedway, Speedway, Indiana
• Chula Vista International Raceway, Chula Vista, California
  
• Crandon International Off-Road Raceway, Crandon Wisconsin
  
• Mount Panorama Circuit, Bathurst, AUS
• Antelope Valley Fairgrounds
  
• Bercy Kart Masters @ Bercy Omnispots Palace, Paris, FRA
  
• Boone County Fairgrounds
• Local Park
• Skid Pan
  

Tracks highlighted in yellow indicate that these tracks will only host motorcycle, sidecar and pocketbike racing, as well as Superkarts, Kantti cars, and other small vehicles due to the track lengths shorter than 1.609344km/1.000 mile.