Enjoy my modified QeffectsGL. :) All thanks for the program goes to XaeroX, the maker of QeffectsGL. Copy the files from the archive (QeffectsGL_readme.txt, opengl32.dll and QeffectsGL.ini) in the Kingpin directory, where your Kingpin.exe is. After you run the game, a log file will appear (QeffectsGL.log). You can read it to see if you have any errors. To uninstall, just delete the three files.
Due to SSAO not properly displaying shadows (fuzzy shadow appears around the model feet, through shadow on ground is ok) edit QeffectsGL.ini with notepad and change SSAO=1 to SSAO=0, like below. The rest can be on default, because if you change to SSAO=0, it doesen't take into account the others. Look in Moddb "images" to see a comparation between the two images. You can download v.1 (already edited file, if you don't want to make yourself the modification)
And if you run the game at a lower frame rate than usual, change the below numbers to a lower ones.