Id like to be able to dynamically return items in the file browser

 

e.g. if inserting a link i want to be able to show products in my database in the list so the user can link to the product, the item is not a physical file on the server. 

ideally id like to be able to have the following

 

 /files - when expanded shows files in the users home directory ( as happens now )

/products - a list generated from the categories and products in my database

 

 

is there a class/method i can override to modify what is being returned to the dialog?