It wasn't that the "stig" didn't have downforce, It was because of the setup and the one that ate tyres had a slightly oversterry setup.
Top Gear
A pre-production CCX was featured on the May 7, 2006 episode of BBC motoring programme Top Gear. It was test-driven by Jeremy Clarkson, who praised the car highly but criticised its lack of downforce, which he attributed to the lack of a rear spoiler. He also claimed it was a replacement for smoking, saying it 'is the worlds most expensive nicotine patch'. The first power lap time was 1:20.4 seconds, with The Stig encountering short-shifting problems. Later in the same episode, The Stig lost control of the car during his second attempt to beat the Pagani Zonda F's time (1:18.4 around the Dunsfold Park track); the Stig also went on to suggest that the car would be significantly faster and more stable with a spoiler (according to Clarkson, as the Stig never speaks on camera). Koenigsegg then said that they would put a rear spoiler on the car and bring it back to Top Gear for further testing.
For the May 28, 2006 episode of Top Gear, Koenigsegg had supplied a CCX fitted with a rear wing. The Stig had another attempt, this time setting a new lap record—1:17.6. The carbon-fibre rear wing is available as optional equipment, though it drops the car's top speed to 242 mph from 250 mph.
On the episode of The Stig's crash, Jeremy Clarkson claimed that with the Koenigsegg CCX, he had found a substitute for smoking. He said "Unlike any other supercar [...] this doesn't feel sanitized or tamed". Clarkson continued "It's just completely wild and mad. It's raw, vicious, unbridled power." The Koenigsegg is able to virtually match the performance of the Bugatti Veyron, despite it having approximately 200 bhp less, because it is approximately 700 kg lighter.
In June 2006, Swedish car magazine Bilsport published an on-line article where Koenigsegg press contact Lotta de Salvatore claimed that the improved lap time was not thanks to the rear wing, as the Top Gear presenters claimed. Instead, a better chassis set-up had allowed The Stig to improve the Koenigsegg CCX's lap time by 2.8 seconds.
The reason The Stig went off the first time was that we hadn't had time to set the car up properly, it was oversteering slightly. For the second attempt the CCX had a perfect set-up and better grip. The wing doesn't do any good at the speeds seen on the Top Gear track, only above 300 kph does it start helping. – Lotta de Salvatore, Bilsport
I have a radeon 9550SE and it will run LFS but I need to always reinstall the driver and it only averages 40fps (1280 x 1024 No AA or AF)with my car on the track! I only get 14fps on NFSC