Wow, I can't imagine what you and your mom are feeling...I am so sorry.
My mom had 31 tx's of IMRT and 8 cycles of Erbitux. She didn't burn so to speak, it was more like a darkening of her skin on her face. She constantly says that she looks like our Bischon, she thinks it looks like a dirty muzzle. It really isn't that bad, she can wear make-up over it and it lightens it a little. She too has been very self conscious about people seeing her looking like that and who can blame them? My mom did have some issues on her chest, though we can't pinpoint if it is from the chemo rash, or maybe the radiation. I tend to think it was caused by the chemo antibody.
Aquaphor and dombero soaks, both available over the counter, work very well for skin conditions and my mom says it feels very soothing.

My mother completed her rad treatments the end of Aug. '07, she was finally beginning to come around from the fatigue, was starting to see that some of her taste buds were returning and her tongue was looking fairly normal. From the beginning of this treatment plan we knew that she would get a few weeks off and then have brachytherapy, internal radiation. To be quite honest, I don't know which of us was more upset that she had to go back in for more treatment--but it had to be done.
I am her primary caregiver. What I can share with you is that I myself had to muster so much faith to get her through it and to help me also. My mom cried, and when she cried I cried also-though not nearly as much, I usually cried at the supermarket when I was alone. I also had to be the one to say, 'ok this is going to be tough, but you will beat this, you have to get up and force yourself to go to every appt.' She did, never missed one--can't say that I would have been that strong. It's a hard call to define the line of parent and child, while I had to take over, I didn't want to rob her of any respect or her independence. I think I gently gave her little pushes, I listened a lot to what she had to say, I shared absolutely EVERYTHING