I am likely going to begin the tear down soon on the Photon for this mod. The easy part is finding the + and - contacts with a voltmeter. The hard part is soldering so you don't F up the phone. I have not seen anyone post a walk through yet for the Photon.
Here is a slightly better walk through for the Evo 4G: Facebook
I'll post when I get a chance to try this mod for the Motorola Photon 4G. I'm already missing the inductive Touchstone charger on the Palm. If you see something posted somewhere else, let me know.