I'm about 95% done a Dark Souls Save Editor, with full inventory editing. I don't have the time anymore to continue it, but if anyone with sufficient C# skills (and proof they actually know what they're doing) would be interested in finishing it, I'd happily share the spotlight with said person.
I am dealing with VERY minor issues. I think it could be 2-3 hours, and the save editor is done, and your name is on it :P
It currently does EVERYTHING but the inventory editor part. This is the only thing that needs to be finished, and the hex locations as well as a database of items is already finished, it's just some issues with getting it all to work together.
Post here or PM, I'll be around.