My kids have DSs, I don't really use them or know too much about them myself and the kids are too young to do anything other than play the games. Anyway, I got them AceKard 2i's and they've been really easy to use. Today my son was showing me if he copies a game on the card he can trim it to save room on his micro SD. He's been doing it one at a time, so I googled and found a few different tools that can do them in batches on the pc, this is where my questions come from. Please help if you can - What's the best windows trimmer ? - Do any games have problems if trimmed ? I'll trial and error some in the meantime, but obviously there must be some of you guys n gals here with a lot of experience with this that can maybe point things out I might not notice. Any help is appreciated, thanks.