My game crashes to the desktop at the loading screen right before I enter the sewers, where Philip says: "The sewers seemed like the only route out, but it wasn't out I wanted anymore. My father had found something, and I needed to know what - without that, everything would have been for nothing."
Here's a screenshot of the BlackBox error report window:
I have taken it's advise, and done all of the things that it suggests, but still the problem occurs.
I trust that you will want my hpl.log, so here it is:
----------START----------
-------- THE HPL ENGINE LOG ------------
Creating Engine Modules
--------------------------------------------------------
 Creating graphics module
 Creating system module
 Creating resource module
 Creating input module
 Creating sound module
 Creating physics module
 Creating ai module
 Creating gui module
 Creating haptic module
 Creating scene module
--------------------------------------------------------
Initializing Resources Module
--------------------------------------------------------
 Creating resource managers
 Misc Creation
--------------------------------------------------------
Initializing Graphics Module
--------------------------------------------------------
 Init low level graphics
 Setting video mode: 800 x 600 - 32 bpp
 Init Glee...OK
 Setting up OpenGL
  Max texture image units: 16
  Max texture coord units: 8
  Two sided stencil: 1
  Vertex Buffer Object: 1
  Anisotropic filtering: 1
  Max Anisotropic degree: 16
  Multisampling: 1
  Vertex Program: 1
  Fragment Program: 1
  NV Register Combiners: 0
  NV Register Combiners Stages: 11
  ATI Fragment Shader: 1
 Creating graphic systems
  Creating Renderer2D
  Renderer2D created
  Creating Renderer3D
   Load Renderer3D gpu programs:
    Extrude
    Diffuse Vertex
    Diffuse Fragment
    Fog
   Creating fog textures: Solid Additive Alpha 
   init sky box
  Renderer3D created
 Creating screen buffers size 800.000000 : 600.000000
 Creating programs
 CG ERROR : The compile returned an error.
 -----------------------------------
core/programs/PostEffect_Motion_fp.cg(32) : error C5013: profile does not support "for" statements and "for" could not be unrolled.
 -----------------------------------
Error loading: 'core/programs/PostEffect_Motion_fp.cg'!
ERROR: Couldn't create program 'PostEffect_Motion_fp.cg'
Dynamic loops in motion blur fp not supported, loading static instead.
  RendererPostEffects created
 Adding engine materials
--------------------------------------------------------
Initializing Sound Module
--------------------------------------------------------
 Initializing OpenAL.
  Trying to open software device... Success!
  Device name: Generic Software
  Number of mono sources: 32
--------------------------------------------------------
Initializing Game Module
--------------------------------------------------------
 Adding engine updates
 Initializing script functions
--------------------------------------------------------
User Initialization
--------------------------------------------------------
Trying to load vertex program!
Success!
All set up done, starting game!
--------------------------------------------------------
Game Running
--------------------------------------------------------
Loading collada for 'maps/level04_messhall.dae' took: 1316 ms
ERROR: Couldn't create material 'particle_rockpiece.mat'
ERROR: Couldn't create material 'particle_rockpiece.mat'
ERROR: Couldn't create material 'particle_metalpiece.mat'
ERROR: Couldn't create material 'particle_metalpiece.mat'
ERROR: Couldn't find particle system file 'particle_imp_generic_hard.ps'
WARNING: Parent 'group3' couldn't be found! Failed to attach 'artefact01_pointLight1' to 'artefact01'.Attaching directly to mesh.
ERROR: Couldn't find particle system file 'particle_imp_generic_hard.ps'
ERROR: Couldn't create SoundEntity 'unbreak_impact_metal_soft_furniture_med.snt'
WARNING: Couldn't preload sound 'unbreak_impact_metal_soft_furniture_med'
ERROR: Couldn't find particle system file 'particle_imp_generic_hard.ps'
WARNING: Geometry for joint child '' is missing! Might be connected to bone.
WARNING: Geometry  joint parten '' is missing! Might be connected to bone.
WARNING: Geometry for joint child '' is missing! Might be connected to bone.
WARNING: Geometry  joint parten '' is missing! Might be connected to bone.
WARNING: Geometry for joint child '' is missing! Might be connected to bone.
WARNING: Geometry  joint parten '' is missing! Might be connected to bone.
WARNING: Geometry for joint child '' is missing! Might be connected to bone.
WARNING: Geometry  joint parten '' is missing! Might be connected to bone.
WARNING: Geometry for joint child '' is missing! Might be connected to bone.
WARNING: Geometry  joint parten '' is missing! Might be connected to bone.
WARNING: Geometry for joint child '' is missing! Might be connected to bone.
WARNING: Geometry  joint parten '' is missing! Might be connected to bone.
WARNING: Geometry for joint child '' is missing! Might be connected to bone.
WARNING: Geometry  joint parten '' is missing! Might be connected to bone.
WARNING: Geometry for joint child '' is missing! Might be connected to bone.
WARNING: Geometry  joint parten '' is missing! Might be connected to bone.
WARNING: Geometry for joint child '' is missing! Might be connected to bone.
WARNING: Geometry  joint parten '' is missing! Might be connected to bone.
WARNING: Geometry for joint child '' is missing! Might be connected to bone.
WARNING: Geometry  joint parten '' is missing! Might be connected to bone.
WARNING: Geometry for joint child '' is missing! Might be connected to bone.
WARNING: Geometry  joint parten '' is missing! Might be connected to bone.
WARNING: Geometry for joint child '' is missing! Might be connected to bone.
WARNING: Geometry  joint parten '' is missing! Might be connected to bone.
WARNING: Geometry for joint child '' is missing! Might be connected to bone.
WARNING: Geometry  joint parten '' is missing! Might be connected to bone.
WARNING: Geometry for joint child '' is missing! Might be connected to bone.
WARNING: Geometry  joint parten '' is missing! Might be connected to bone.
WARNING: Geometry for joint child '' is missing! Might be connected to bone.
WARNING: Geometry  joint parten '' is missing! Might be connected to bone.
ERROR: Couldn't find particle system file 'particle_grass_crash.ps'
ERROR: Couldn't find particle system file 'particle_grass_crash.ps'
WARNING: particle system 1 in flamablebarrel01 does not exist anymore!
Loading collada for 'maps/level05_sewers.dae' took: 698 ms
ERROR: Couldn't create material 'particle_rockpiece.mat'
ERROR: Couldn't create material 'particle_rockpiece.mat'
ERROR: Couldn't create material 'particle_metalpiece.mat'
ERROR: Couldn't create material 'particle_metalpiece.mat'
ERROR: Couldn't texture 'box_small_crate.jpg'
----------END----------
If you want, I can post the error report that I saved via BlackBox,
entitled: 'errorlog-27-05-2008(11.31.37)', but it is rather long.
I hope that you can be of help, as I am really looking forward to playing this game. 
-Dukem