Product autocomplete input on module

[Shemes]

I'm developing a module that has to make lists of existing products.

For the configuration panel of the module, using renderForm() and getContent(), I'm trying to replicate the "accesories" capability, where you start writing some info of a product on an input, and it shows the products that are a match. When selecting that product, it gets added on a list. Like this:

 

This a screenshot of Catalog / Products / Associations tab.

I'm trying with PS 1.6.0.14 and PS1.6.1.0RC3. How would I replicate this functionality to get lists of products on a module configuration panel?

I tried looking here Prestashop AdminProductsController.php but I don't really understand where half of that info is coming from.