To enable the shaders, one entry in the fsx.cfg is needed and you also have to force a rebuild then. Those two steps are vital, others may be too.

From the readme. You can either use the installer or do all the steps listed here.

Quote:

DETAILED INSTALLER ACTIONS ========================== The auto-installer will perform the following actions AUTOMATICALLY:      AUTOMATIC INSTALLATION      1) Copy a temporary folder with the new Shaders to your FSX root directory with the name: ShadersHLSL_SM3_BOJOTE      2) Copy a temporary WaterConstants.Xml file to your FSX root directory with the name: waterconstants_sm3_bojote.xml      3) Copy this readme file to your FSX root directory 'Shader3 Mod for FSX' subdirectory with the name: readme.txt      4) Automatic rename of your original ShadersHLSL folder to ShadersHLSL_ORIGINAL      5) Automatic rename of your original WaterConstants.Xml file to WaterConstants.Xml.BAK      6) Automatic rename of the temporary folder ShadersHLSL_SM3_BOJOTE to ShadersHLSL      7) Automatic rename of the temporary waterconstants_sm3_bojote.xml file to WaterConstants.Xml      8) A 'Shader3 Mod for FSX' subdirectory is created under your FSX Root with 'optional' goodies, readme files and misc information.      9) DX9 & DX10 cached shaders are automatically DELETED. This folders are located here:         %LocalAppData%\Microsoft\FSX\Shaders and %LocalAppData%\Microsoft\FSX\Shaders10 this is a completely SAFE operation.      10) Once all the above steps are complete, the following changes will be performed on your fsx.cfg file:            [GRAPHICS] => ALLOW_SHADER_30=1            [GRAPHICS] => SHADER_CACHE_PRIMED_10 is REMOVED            [GRAPHICS] => SHADER_CACHE_PRIMED is REMOVED            [GRAPHICS] => SHADER_CACHE_VERSION is REMOVED            [MAIN] => PerfBucket is REMOVED            [MAIN] => ProcSpeed is REMOVED            ALL the removed values (except SHADER_CACHE_VERSION) will be written again by FSX to your fsx.cfg in the next restart so this            changes are 'minor' and completely reverted by doing an uninstall.      AUTOMATIC REMOVAL      1) Automatic Delete of current ShadersHLSL      2) Automatic Delete of curent WaterConstants.Xml      3) Automaic rename of backup (original) ShadersHLSL_ORIGINAL folder to ShadersHLSL      4) Automatic rename of backup (original) WaterConstants.Xml.BAK to WaterConstants.Xml      5) The changes made by the installer to your fsx.cfg ARE reverted. The ALLOW_SHADER_30 line will be removed.      6) Complete removal of the 'Shader3 Mod for FSX' folder that we created on your FSX root directory      THE REASON WE PROVIDE THIS DETAILED LOG IS FOR YOU TO KNOW 'EXACTLY' WHAT THE INSTALLER IS DOING. The installer is NOT necessary to install