From: Near Portland, OR
First off all switches are applied to the Quick Start shortcut, never the one that takes you to "autorun.exe". All switches have a dash '-' in front of them, all are separated by spaces, and all go outside the quotes at the end of the command line. Unfortunately every machine is a bit different, so the switches that will work for you are different than what worked for someone else. -w usually helps better with modern monitors and video cards, many have found -deepColor helps with Windows 10, and with multiple core processors, usually something like -cpu1 helps with lag between clicks and something happening.
If you haven't installed the patches, you will have to install at least patch 1 for most of the switches, the latest patch is strongly recommended. Once the patches are installed, you will have a PDF which is a mini-manual update, the switches added for patch 1 are documented in there.
WitP AE - Test team lead, programmer