Sorry for the late reply, this work was done on saturday and mostly on sunday.
I begun working on creating a rig for Patches. Here are some processes I went through...

Above: Patches with his skeleton

Above: Pole vectors used in conjunction with an IK handle on the leg and some ikSC solvers for his feet to create some knee rigs

Above: Hip joint used in the centre of the skeleton

Above: Used some clusters linked to the skeleton's spine

Above: IK handle used to rig the arms with finger movements used via the attributes editor

Above: Final rigged character
All that I need to do now and aim to get done by tuesday next week will be to have all rigs for all four characters completed and most (if not all) of them weight painted.