two problems

first one about nlapiScheduleScript: the following code is from the guide,
function updateSalesOrders()
{
   var context = nlapiGetContext();
   var searchresults = nlapiSearchRecord('salesorder', 'customscript_orders_to_update')
   if ( searchresults == null )
      return;
   for ( var i = 0; i < searchresults.length; i++ )
   {
      nlapiSubmitField('salesorder', searchresults[i].getId(), 'custbody_approved', 'T')
     if ( context.getRemainingUsage() <= 0 && (i+1) < searchresults.length )
      {
         var status = nlapiScheduleScript(context.getScriptId(), context.getDeploymentId())
         if ( status == 'QUEUED' )
            break;    
      }
   }
}

here we see that if the usage consumed by the script is not enough, we could  schedule another execution. but we are not sure what is the value for i at this time, or we do not know when the execution stops? so i guess the system remembers the breaking point, right? when nlapiScheduleScript is called again, it starts to execute from the interruption?