cocos2d XCode templates

You can start a cocos2d project within XCode from a template.

To do that you need to follow the instructions from this post:
Project and File Templates
This template also includes Scene and Layer classes.

Another template (from another user) can be found in this post:
XCode template for cocos2d

And last, you can find here another template for cocos2d. This one is for cocos2d v0.5.3
XCode Template