Pictures is implemented in cstImageEnt class. Please look at the following example.

<?xml version="1.0" encoding="UTF-8"?>
<cadsofttools version="2">
    <!-- Add entities -->
  <add>
  <cstSectionObjects Name="OBJECTS">
    <SubEntities>
      <cstDictionary name="IMAGEDEFS">
        <SubEntities>
          <!-- FileName="Specify the file path" -->
          <cstImageDef  FileName="%SGSAMPLESPATH%\image.jpg"   HandleSave="@1"/>
        </SubEntities>   
      </cstDictionary>
    </SubEntities>
  </cstSectionObjects>
   <!-- Point - insertion point (corresponds to the bottom left corner of the image) -->
   <!-- Point1 - top left corner in the drawing coordinates (top left corner of the image) -->
   <!-- Point2 - bottom right corner in the drawing coordinates (bottom right corner of the image) -->
   <cstImageEnt Point="0,0,0" imagedef="@1">
     <Calc mode="0" Point1="0,100,0" Point2="100,0,0"/>
   </cstImageEnt> 

 
   <cstImageEnt Point="0,0,0" imagedef="@1">
     <Calc mode="1" Width="100" Height="400" Angle="30"/>
   </cstImageEnt> 
  
  </add>
    <fittosize />
</cadsofttools>