Hi Vic,
This is indeed one of the most hardest phase in the life of a Thal. but as your child grows old, he will understand it.
Isn't Exjade available to your medical facilities? I hope it is and your family will be able to avoid the trauma and pain of Desferal.
As for your question, well the preparation isn't hard at all, you will get the hang of it in one lesson if your instructor is a good one and tells you all the minor details (like the tiny air in/out details etc.). Another thing, if everything goes well till the end, you won't even see a drop of blood, even on the bandage that you will remove after the injection site is healed.
Well, my father was the only one who had to do the hard part, as a matter of fact, he did it all of it since my mom is so emotional and can't even see anyone getting pricked. As for me, I didn't hate dad at all, but I hated the time when he set up everything and I'd wished that evening didn't come (since, we did the Desferal at night).
I hope that you get Exjade rather than all this, but if you don't, then I hope your brave little soldier will understand this soon that it is for his own good and will not let pain overcome him.
Take care, Peace!