I don't know of a downloadable document covering all of the farmedic-type material, but there are a couple of articles on farm incidents and initial response here:
http://www.farmedic.com/docs/
You might also contact a sales rep for various rescue tools, and see if they can point you in the right direction (Hurst, Holmatro, Howell) - Holmatro sent us some disks a couple of years ago with videos of different extrication strategies.