This patch is shipped with PCSX2 starting with v1.7.5746.
NASCAR Heat 2002, the first PS2 game from Monster Games, shipped with 4 control schemes to choose from. One of those control schemes was called “Shoulders”, and mapped throttle/brake to R2/L2. This translates really well to modern gamepads, allowing the player to use triggers for precise throttle control.
For unknown reasons, Test Drive: Eve of Destruction removed this control scheme. What makes this decision even more puzzling is a fact that Test Drive EoD was also released on Xbox, a console with pressure sensitive triggers in place of PS2’s shoulder buttons!
With this code, I modified one of the alternate controls sets to swap L1/R1 with L2/R2.