Resource Allocation

I am working as a Planner in a construction project. I am using P3 as a project planning tool. I want to put a number of resources (with quantity) in Left pan area for a number of activities. So, that I can say in a particular week, these are the activities to be excuted and their respective different sort of resources are also provided. This will help the construction site engineer to organise and plan for his next week’s programme with respect to materials as well as manpower also. I want the Gann chart in right pan as usual. How can I get this in P3 Window?