How could I launch "octomap_server>octomap_mapping.launch" with "openni_launch>openni.launch"?

edit

How could i do?

Update 1:

Hi my friend, i hava robot location in 2D mapping without any odometry. and i wanna 3d mapping with xtion.

i did it just for launch!

mrl-x200@mrlx200-ThinkPad-X200:~$ roscd
mrl-x200@mrlx200-ThinkPad-X200:~/fuerte_workspace$ roscreate-pkg mapping_3d    std_msgs roscpp
mrl-x200@mrlx200-ThinkPad-X200:~/fuerte_workspace$ nautilus mapping_3dstd_msgs/
[/home/mrl-x200/fuerte_workspace/mapping_3dstd_msgs]
[right_click->    create new document->    empty document] && [name=do.launch]

<?xml version="1.0"?>
<launch>
    <include file="$(find openni_launch)/launch/openni.launch"/>
    <node pkg="octomap_server" type="octomap_server_node" name="octomap_server" output="screen">
        <param name="resolution" value="0.05" />       
        <param name="frame_id" type="string" value="camera_link" />
        <param name="base_frame_id" type="string" value="camera_link" />
        <param name="sensor_model/max_range" value="5.0" />
        <remap from="cloud_in" to="camera/depth/points" />
    </node>
</launch>

mrl-x200@mrlx200-ThinkPad-X200:~/fuerte_workspace$ roslaunch mapping_3d do.launch
mrl-x200@mrlx200-ThinkPad-X200:~/fuerte_workspace$ rosrun rviz rviz

now I trying with hector_mapping

<?xml version="1.0"?>
<launch>
    <include file="$(find openni_launch)/launch/openni.launch"/>

    <node pkg="tf" type="static_transform_publisher" name="camera_link" args="0 0 0 0 0 0 base_footprint camera_link 100" />

    <node pkg="octomap_server" type="octomap_server_node" name="octomap_server" output="screen">
        <param name="resolution" value="0.1" />     
        <param name="frame_id" type="string" value="map" />
        <param name="base_frame_id" type="string" value="base_footprint" />
        <param name="sensor_model/max_range" value="5.0" />
        <remap from="cloud_in" to="camera/depth/points" />
    </node> 
</launch>

What is your opinion? :)