No no no no no, It is much better to have radiation first then chemo afterwards. What if you sick and puke in the mask while you are on the table. He just should just reply "you don't know jack".

He should get Radiacare for his neck. Ask the RO people, they usually have small sample tubes. Make sure, though, that his neck is clean and dry just before each radiation treatment. Some lotions can have a bolus effect and can exacerbate the skin damage. Many people getting radiation don't have anything worse than a mild sunburn, so just take it each day as it comes. When it gets itchy, towards the end of treatment, DON'T SCRATCH IT! They gave me a steroidal cream and it took the itching right away. I only had to use it a couple of times.
Can't address the chemo schedule, I had 2 Cisplatin infusions 3 weeks apart.