18 Wheels of Steel: Haulin'
Full user review
"Good, though short trial."
It ran nicely at 800x600 on a 1.3GHz machine, some nice looking graphics and a range of graphics options. Decent gameplay, at least they handle like trucks!
The 60 minute trial (TIP:do a few short trips on this rather than one long one)and the full game does not seem to be available in the UK.