REST API with CakePHP 1.1

I'm trying to expose some of the functionality of my site in a REST-ful way.  Due to the environment set up at my company (a bunch of internal sites, all using a shared CakePHP configuration with an arcane syncing setup, etc.) I am using CakePHP 1.1.  Looking at CakePHP documentation I see in version 1.3 there appear to be some features that may be useful to me.  

http://book.cakephp.org/1.3/en/The-Manual/Common-Tasks-With-CakePHP/REST.html

But I'm not sure if these will work with 1.1.  Anyone familiar with what does and doesn't work in the older versions?  Should I create a new model/controller whose job it is to process GET and POST requests, and return JSON/XML (and from this controller, call functions in other Models to submit and retrieve data?)  I'm not sure if that is a "Cake" way to do things or not.

Any insight would be appreciated. 

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