>>3516
Go to the chick in the top left of the shop. Really, when you have a problem, just go around clicking on all the 'shiny' stuff. This is one of those games. It's also one of those games that pads out its runtime, by making you zip back and forth across the map.
Also, after you get the twins, go home and save your game at the computer. Make a new save file. I don't think you'll be able to go home after you advance the story, so you'll have to play through the whole thing again just to see the shit that you've unlocked. Fucking retarded oversight on the part of the developer, to be honest.