I don't have AIM or MSN, and I'm not a member, but I might be able to help you.
RadialWalk is quite frusterating and rather hard to learn. Even when I thought I understood it, and partially got it working. It turned out I didn't.
RoadWalkTol is much easier to use, however.
FindRoadColor will automatically get the road color for you when put in the Color section of the command. But you don't only have to use it for Roads. You can use it for any color you want.
You have to have your camera set up in the right direction (North works best), and then you decide what direction you want to go, what color you want it to find, and the tolerance it should let the color have. Here's an example:
SCAR Code:
RoadWalkTol(FindRoadColor, 'W',5);
FindRoadColor will get the road color for you, 'W' is West. You can change that to anything. And 5 is the tolerance.
Mess around with it, get to know it. It's a lot easier to use than RadialWalk. That also means that it's not as accurate, however.