Test Drive Unlimited 2 (TDU2) - Unofficial Patch Update 0.4 - REVIEW
DOWNLOAD + Instructions: http://blog.sethioz.com/2014/04/test-drive-unlimited-2-tdu2-unofficial.html
YES this patch works ONLINE.
What happens if others don't have it? Then they will simply see the default "error vehicle" which will appear as broken green Lancia Delta on their side. It will not crash their game or make you invisible to them.
How to play offline: Download TDU2 Universal Launcher here http://i-knyazev.ru/
Use the launcher to launch TDU2 and choose offline. If you get message "cheater detected", quit game, repeat the process, but this time as soon as TDU2 launches, quickly alt-tab out of game and quit the launcher. Works fine!