Hi again! I'm really a newbee, after searce on the net for an description for that command 'chmod', with results that I do'nt need or understand, the command 'man chmod' (a tips from this forum) gave me all I need to know. Well,  step 1 was to make the file executable, ok. That worked.
Next step was to execute that file. That worked too. No problem. Have a link to the game in my menu. But I can't get it to start. Return to the terminal, sudo su, pathing me down to the catalog containing pslaunch and started it with ./pslaunch. Result:

WARNING: could not load plugin 'crystalspace.syntax.loader.service.text'
ERROR: Couldn't load plugin with class 'crystalspace.syntax.loader.service.text'!
WARNING: failed to initialize plugin 'crystalspace.graphics3d.shadercompiler.xmlshader'
WARNING: failed to initialize plugin 'crystalspace.graphics3d.shadercompiler.weaver'
WARNING: could not load plugin 'crystalspace.syntax.loader.service.text'
ERROR: Couldn't load plugin with class 'crystalspace.syntax.loader.service.text'!
WARNING: failed to initialize plugin 'crystalspace.graphics3d.shadercompiler.xmlshader'
WARNING: could not load plugin 'crystalspace.level.loader'
WARNING: could not load plugin 'crystalspace.level.loader'
WARNING: Can not load default shader vars, no iSyntaxService available
Opening GLX2D
Creating Context
Checking for updates to the updater: Using mirror http://216.6.227.163/xordan/
Update Available!
Video driver GL/X version (direct renderer)
Visual ID: 0x00000024, 24bit TrueColor
R8:G8:B8:A8,
level 0, double buffered
WARNING: could not load plugin 'crystalspace.syntax.loader.service.text'
ERROR: Couldn't load plugin with class 'crystalspace.syntax.loader.service.text'!
NOTIFY: Applied: GeForce: RECT texture extension support apparently sucks
NOTIFY: Applied: NVidia: GENERATE_MIPMAPS does not generate last level
NOTIFY: OpenGL renderer: GeForce4 MX 440/AGP/SSE2 (vendor: NVIDIA Corporation) version 1.5.8 NVIDIA 96.43.17
NOTIFY: Using windowed mode at resolution 1024x768.
NOTIFY: Pixel format: Color: 24 Alpha: 8 Depth: 24 Stencil: 8 AccumColor: 48 AccumAlpha: 16 MultiSamples: 0
NOTIFY: Using VBO with 64 MB of VBO memory
Default shader /shader/std_lighting.xml not available
Default shader /shader/std_lighting_portal.xml not available
WARNING: could not load plugin 'crystalspace.renderloop.step.generic.type'
Failed to load plugin crystalspace.renderloop.step.generic.type; pandemonium will ensue.
WARNING: could not load plugin 'crystalspace.rendermanager.unshadowed'
No rendermanager set!
Mounting skin: /planeshift/art/pslaunch.zip
Texture Manager parsing /paws/launcher/imagelist.xml
Tue Dec 14 07:20:57 2010, <src/common/paws/pawsimagedrawable.cpp:66 PreparePixmap SEVERE>
Tue Dec 14 07:20:57 2010, Could not open image: >/paws/base/maps/leather/top_left_1.png<
Tue Dec 14 07:20:57 2010, <src/common/paws/pawsimagedrawable.cpp:66 PreparePixmap SEVERE>
Tue Dec 14 07:20:57 2010, Could not open image: >/paws/base/maps/leather/top_right_1.png<
Tue Dec 14 07:20:57 2010, <src/common/paws/pawsimagedrawable.cpp:66 PreparePixmap SEVERE>
Tue Dec 14 07:20:57 2010, Could not open image: >/paws/base/maps/leather/bottom_left_1.png<
Tue Dec 14 07:20:57 2010, <src/common/paws/pawsimagedrawable.cpp:66 PreparePixmap SEVERE>
Tue Dec 14 07:20:57 2010, Could not open image: >/paws/base/maps/leather/bottom_right_1.png<
Tue Dec 14 07:20:57 2010, <src/common/paws/pawsimagedrawable.cpp:66 PreparePixmap SEVERE>
Tue Dec 14 07:20:57 2010, Could not open image: >/paws/base/maps/leather/left_1.png<
Tue Dec 14 07:20:57 2010, <src/common/paws/pawsimagedrawable.cpp:66 PreparePixmap SEVERE>
Tue Dec 14 07:20:57 2010, Could not open image: >/paws/base/maps/leather/right_1.png<
Tue Dec 14 07:20:57 2010, <src/common/paws/pawsimagedrawable.cpp:66 PreparePixmap SEVERE>
Tue Dec 14 07:20:57 2010, Could not open image: >/paws/base/maps/leather/top_1.png<
Tue Dec 14 07:20:57 2010, <src/common/paws/pawsimagedrawable.cpp:66 PreparePixmap SEVERE>
Tue Dec 14 07:20:57 2010, Could not open image: >/paws/base/maps/leather/bottom_1.png<
DEBUG: Initializing OpenAL sound system
DEBUG: Retrieving available devices.
Segmenteringsfel (segment error)

I've seen this type of errors in the same situation described in several places in this forum, but no one of them I've checked, has get any answers. My computer meets all the nessesery requirements the game want me to have.

I've even run the command 'sudo ./pslaunch --repair', but the result is the same. This issue must belong to this forum -Technical help: Problems BEFORE entering the game. I hope there is a solution.

Hi ohforf! I'm try to use the installer, and to use it, the descriptions I've read says "chmod  installer" but chmode complain at "x" (don't know that flag) and it don't find the installer, despite it's in the same directory as I worked in. When I tryed the second time, I get the prompt wihtout any complains, and then I trie the second command. But the first command doesn't did anything with the installer, why? The software that the command "chmod" belong to, must be there, else the op should complain about unknown command? So, what to do?