Here is something that I wrote a little while back. It will do what you want, but you will have to do some work in creating your template.
http://www.gfy.com/webmaster-q-and-fuckin-a/749929-fhg-ripping-script.html
It will rip the thumbs and you can change the ImageMagick string and set it to the filter of your choice. You can resize thumbs or crop them. It will also create an exact replica of a FHG and transfer it to a location on your server. Even the template based "ripping of thumbs" will save the template on your server.
Give it a look. If you need any help with it just read the doc for contact info. The only cost is a hard link.