I'm not asking about the method to play alternative dols from an HDD, I'm asking about the very existence of an alternative dol in a game. Really, some games like SSX Blur has only the first screen in the main.dol, then it loads an alternative dol. Metal Slug Anthology plays the first five games just fine, then the sixth through an alternative dol. Metroid Prime Trilogy is totally segmented by alternative dols. What's the magic in the use of alternative dols? Does it bring any advantage to the game? Disc loading faster? Anything? Couldn't the games have only one dol and extinguish the need to reload?