The basic forum understands picture/file links in your posts from off-site photo sharing sites like FakeBook and Web-Shots. If you want to upload pix *here*, this forum will allow that too. It's part of the membership fee you paid for signing up here (and worth every penny!). But you have to ask an admin to set you up, offering them a bribe may expedite the procedure. I'm just saying, not like the admins accept bribes of any sort!
Your old driveshaft couplings wore in to your machine. If you install a used drive shaft, I might suggest going easy on the "loud" handle for a modicum of time/miles to allow the newly mis-matched components to meld into oneness with the world. This is just my opinion.
Your U-joint may have wedged because the driveshaft broke, and not the other way around. May have.
No service procedures for greasing the U-joint, only "replace the drive shaft".
Light coat of grease, I like a high moly content grease (like CV joint grease), on the forward splined connection. And do anticipate a modicum of sweat and swear words when reinstalling the front joint. It's a real precision fit, but it *will* fit.
Rick