Forum:Loading scenes

I don't have or seen the GTA episodes from liberty city loading scenes for xbox360, ps3 or pc. Can you tell me how this new disc works. I am not talking about the DLC but the disc for either ps3 or pc. You choose what game you want and it will load with than specific character? The game will just load up like GTA IV? OR Will the game load up like GTA IV and then choose the game you want?

Also, can the vehicles and weapons you have on the one story be used on the other story?