For an automated way of doing this, check out this topic by origamiguy.
Wouldn't it be nice if we could MOD LEGO Racers 2 and Drome Racers without rebuiding the GAMEDATA archives every time we want to see our changes? Surely the developers worked this way, but allas, they hard coded it into the executable to only look for file in the GAMEDATA archives. But what if there was some way we could change that? Some way we could just change that hard-coded variable and put the games file loading mod