Over the last few aeons (by the feel of things) I have been working on a revamp of the RT, DW and DH rules to tie everything together into a single unified system. I've recently been playing with rules for Profit Factor/Influence in a way that makes combining them into a single group a little easier.
The core idea is that each group has an Influence rating, which can be used for acquisitions and the like, and each player has a personal rating which can be spent to improve the groups overall Influence or modify influence rolls that character makes.
One of the aspects of the system that isn't immediately addressed in the following document is that Endeavours add to each players personal Favour (ie Profit Factor) rating, rather than the group Influence rating. Other than that, I hope it all makes sense!
I'd love to get some feed back, even if that's just you yelling "YOU SUCK!" at the screen a half dozen times then trying to find an online service that unleashes packs of wild dogs on people you don't like.
https://docs.google.com/file/d/0ByhgPzi5giNyTlB3OW5QNlI0YmM/edit?usp=sharing