Any way to add a defined folder

Issue Summary

Greetings,

what i'm looking for is a way to set an image field that only allows the user to select an image from a bunch of images that are in ONE specific folder on the server.

This module comes real close but there's 2 points missing:
- Make it so that the user can only access a defined folder with IMCE (IMCE could check if there is an upload folder specified and limit the user access through IMCE to this folder only)
- Only show the IMCE option, not the basic image upload option.

Thanks in advance.