milk carton textures

[RT]

i downloaded the source and i was wondering if the .tar is missing certian
images.  for
example, in the level bombing.xml there is :

<groundpiece type="ground">
  <surface><resource type="datafile">
    <resource-datafile>global</resource-datafile>
  <resource-ident>GroundPieces/pipe_dr</resource-ident>
  </resource></surface>
  <position>
    <x-pos>323</x-pos>
    <y-pos>144</y-pos>
    <z-pos>0</z-pos>
  </position>
</groundpiece>

however after searching for pipe_dr i cannot locate it!  there seems to be
several instances like this.... can anyone offer some help?  does the game
generate some of these images internally?  many of the
<resource-ident>HotSpots/?????</resource-ident>  seem to point to the wrong
directory too.  am i just overlooking something?

thanks!
rt