The December 2002 issue of Automobile has an article and pictures for the show that seem to give away future rounds:
The Desert Pumas (from Chile, driving the Marabunta), that won in the first round, are shown competing with the Aquaholics (fron UK, driving Octopush) and the Snowdiggers (from Canada, driving Steel Survivor), so they probably made it past the first round as well.
Also, there is another picture that shows:
The vehicles of the Body Snatchers, Washburns, Law Dawgs and Flamin’ Aussies all together, so the Body Snatchers and Washburns may advance, since the other two did.
But the second spoiler doesn’t seem as “concrete”.