I'm thinking about buying one of the limited editions that were only released in Japan, but I'm having a hard time figuring out how I would mod it. Google also has not provided any answers so far. I figure my NTSC-U copy of Splinter Cell wouldn't work, but is it as simple as finding an NTSC-J copy or a copy of one of the other games for softmodding? Does SID work with NTSC-J versions of the three games?

If not, what exactly is the easiest and most cost effective way to do it?