I created a new instance, changed the values of a = "xxx.xxxxx"   to    a = "0.0"       in  cfgeventspawns.xml and looked at 8 vehicles and they were all right on the ground. <event name="VehicleOffroadHatchback">
        <pos x="10967.148438" z="5494.307616" a="125.181313" />
        <pos x="11534.269531" z="5014.221679" a="150.176453" />
        <pos x="12896.135743" z="4453.044923" a="334.011871" /> <event name="VehicleOffroadHatchback">
        <pos x="10967.148438" z="5494.307616" a="0.0" />
        <pos x="11534.269531" z="5014.221679" a="0.0" />
        <pos x="12896.135743" z="4453.044923" a="0.0" />   The only problem is that the vehicles buried in their previous instance will remain buried, destroying the vehicles for a new spawn.   At the moment this is all I could find out. Regards.