That's good he gets those services through school. I guess you can look at the CP diagnosis as a good thing because now you know what is wrong and will be able to do the appropriate things to help him.
I bet my older sister would also say that she went through the same things as me...when I had surgeries and such she had to be put on the backburner for a while, but kids don't want to complain about that because they want to be a good sibling and be helpful

. And now with your older son having "problems," he probably feels that he is hurting his brother by taking attention away. That's a tough situation, but just shows that he is compassionate. I'm sure things will get better once he gets more comfortable with needing attention too.