# File lib/ec2/right_ec2.rb, line 456
    def run_instances(image_id, min_count, max_count, group_ids, key_name, user_data='',  
                      addressing_type = nil, instance_type = nil,
                      kernel_id = nil, ramdisk_id = nil, availability_zone = nil, 
                      block_device_mappings = nil) 
            launch_instances(image_id, { :min_count       => min_count, 
                                         :max_count       => max_count, 
                                         :user_data       => user_data, 
                                   :group_ids       => group_ids, 
                                   :key_name        => key_name, 
                                   :instance_type   => instance_type, 
                                   :addressing_type => addressing_type,
                                   :kernel_id       => kernel_id,
                                   :ramdisk_id      => ramdisk_id,
                                   :availability_zone     => availability_zone,
                                   :block_device_mappings => block_device_mappings
                                 }) 
    end