Yes you can import to resource library. There is a small typo in 1 file that you need to change in version 1.1.1 and prior.
Fix:
open file: /admin/model/tool/table_relationships.php
Find line 35:
$this->sections['resource_library'] = array(
'id' => 'resource_id',
'relation_ids' => array( 'resource_id', 'type_id' ),
Replace with:
$this->sections['resource_library'] = array(
'id' => 'resource_id',
'relation_ids' => array( 'type_id' ),
Steps to import
1. FTP new images to /resources/image/ directory. Do not replace existing
2. Create CSV import file (see example attached)
NOTE: resource.type_id for image type is 1
3. Load CSV
4. Check Recourse Library for new added images.
Similar any other types can be loaded. In version 1.1.2 resources can be loaded together with products, categories, etc. Improvements are coming