Cheers, I'd definitely take Offroad's caution on board. 4 full body's is rough, at least initially you really need to hold off on doing anything strenuous at all on the two lighter days. But for me personally I know what I can handle and when to back off so I made it work, even 5 days a week was fine for a short time. That kind of workload really makes fat loss consistent even when you've already lost a lot of fat.
Up to you though, think about what you can handle. You always have the route of sticking to a 'normal' weight routine and just concentrate on making up the deficit with cardio and calorie reduction. That works for most people too.
This is relevant here.