yes, but for now you must do it through bookmarks. here's what you have to do:

1. select the folder (in the folder tree) that you want it to recurse.
2. select the "Bookmarks -> Add Bookmark" menu item.
3. in the dialog that appears, select the "include subfolders" checkbox.
4. press "OK" to save the bookmark.

now every time you select the bookmark you just created, it will search all the subfolders of that folder for images.

mike