[K12OSN] lightweight file manager with good thumbnails

[Peter Hartmann]

Hey all,
I've been looking around for a lightweight file manager than nautilus
that has has good thumbnail support.  I tried xfe but it completely
locks up when you use thumbnail view with hi-res pictures.  Is there a
way to integrate gthumb into a file manager.  Is there maybe a file
manager that has a button to launch gthumb using the current folder? 
Any recommendations?

Thanks,
Peter