The Cool VL Viewer does not use LL's "autobuild" system.
Detailed instructions for building the viewer from sources are... surprise, surprise... provided in the viewer sources ! For Windows, please read linden/doc/WindowsBuildHowto.txt
"Preferences" floater, "Input & camera" tab, "Input controls" sub-tab, in the "Mouse options" section. Do read the tool tips for each option in the Preferences floater: they are worth a full documentation.