carGenerators in ymap?!

meimeiriver

I noticed that every car listed in a Map Editor file, and subsequently gets converted to ymap, disappears. Or, rather, the whole <carGenerators> thing seems to do absolutely nothing. Like:

      <carGenerators>
        <Item>
          <popGroup />
          <position x="-375.974884" y="377.385132" z="110.23085" />
          <orientX value="0.940832" />
          <orientY value="-1.16826189" />
          <perpendicularLength value="1.5" />
          <carModel>surano</carModel>
          <flags value="3680" />
          <bodyColorRemap1 value="-1" />
          <bodyColorRemap2 value="-1" />
          <bodyColorRemap3 value="-1" />
          <bodyColorRemap4 value="-1" />
          <livery value="-1" />
        </Item>
          ....

I'm generally not that interested in seeing a few vanilla filler cars spawned, but why don't they ever show up? And the <carGenerators> sections seems to suggest options that might cause one to spawn customly tuned cars (which I really WOULD be interested in).

Thanks.