I love the Jak series but I can't imagine them fitting in very well with Fallout...though...The Vulcan would probably be *really* fun...and the one Peacemaker mod that make everything anti-gravity? Oh, and the Blaster rifle mod that made the bullets ricochet 2-3 times and you could just spam the fire button while jumping and spinning as a simple "I win" button...Okay, yeah, some of the weapons would be totally cool. I'm be down to make something like that, but I'm really not good at modeling or anything so I don't really have faith that I could. You know, even adding a mod that adds a little radweasel to ride on your shoulder and berate your every failing with sarcastic bite would be pretty fun, too. It's a really cool idea but I highly doubt that anyone has made anything like that. If you have plans to make something and you could use some help, shoot me a PM sometime and we could talk about collaborating on it.