The following commands can be entered into a servers in-game chat window
to make changes to a default configured server.
Many servers may use alternative commands instead of "server". (EX. srv, doit)

server realism (Normal, Expert, Hardcore)
server wear (1x, 2x, 3x, 4x, 5x, 6x)
server track (Daytona, Limerock04, Watkins Glen_SP)
server length (3%, 5%, 10%, ECT)
server qualify (Yes, No)
server identical (Yes, No)
server autodrive (Yes, No)
server rules (None, Black)
server time (Day, Night)
server ai (1, 2, 3, 4, ECT)
server skill (Pro, Custom) (90, 100, 105)