Window Manager Independent Acessibility for Mobility Impaired Disabilities
About me, the author: My profession is software developer and I am a person with mobility impaired disability. About 1,5 years ago, I changed from Windows to Linux. As a result of my disability, I needed special settings for my keyboard and mouse/trackball. Without the linux experience of a friend, it would have been hardly possible to configure these settings.
The following article is just a hint for advanced users, having the same problem.