Change Management approvals

I have setup the change requests queue according to the documents here: Customizing/Approvals - RT 4.0.25 Documentation - Best Practical. However I need it setup to where every one that receives the request has to approve it before it can be acted on. Basically that means 4 people in total in my environment would have to approve it. What would be the best way to do this or is it even possible?

Donny B.