It depends on what you like. My dad makes it all the time. Authentic Japanese ramen is pretty much a completely different food than Americanized ramen.
Maybe not EXACTLY like what you said but the Episode III game had something similar, and so did TFU. Similar, but I think your idea is definitely one to consider.
Basic modding 101. Each model has at least one .skin file to tell the game what images to use for it. Depending on how he sets the model up, certain sections can be turned off so you don't see them. That's how each default Jaden model has multiple heads and outfits as a part of one model. Or how the Obi-Wan Episode III model by HapSlash can have a robe and hood.
I love this idea but it would take away from the JA and JO experience. That method is how saber combat is is every other Star Wars game, and though it works quite nicely, it's one of the main reasons people like JA: for the unique saber combat.
No, I can't think of anything that he released on his own. Infinity Blade did a lot of background work on many projects, especially HapSlash's projects.
I used Audacity to edit it all and WavePad for the effects. For Wat Tambor I just added some flanger and chorus to Rax's voice. For the Jango line I just found 2 words that Jaden says in other scenes and combined them together to make it sound like "Jango".