Q:

How to Combine Textures in Cycles that have been Projected from Different angles?

I'm looking for the texturing method in Cycles, similar to the texturing method in Blender Internal Render. So i have two questions about this process:
1)How do I combine textures in Cycles that have been Project from View-ed from different angles? 
2)Is it possible to "draw" the overlap area of the the textures through the Texture Paint in Cycles? How to draw an alpha-channel for the textures or how to clone one texture over the other in Cycles?

A:

If I understand you correctly, you're trying to figure out how to use different UV maps in Cycles. This question has already been answered very well over here. But I'll try to give you the basics, here.
In BI, using multiple UV maps is pretty easy. In Cycles, it's also easy but not very clear. All you have to do is give names to the multiple UV maps that you make (or use the defaults), and then reference them with an Attribute node. So, add an Attribute node in Cycles, and in the text field just type the name of the UV map you want to use, and connect the noodle from the "Vector" output, to whatever other node needs the UVs.
Hope that helps!

