Shoutbox

a1: no, use SP-NG for the chat-only names and it will work if you paste the code in.

a2: probably like this, for example "Andreyblablabla" would look like this: "·$4Andrey·$9bla·$12bla·$8bla·0"

a3: you can see the code when you open a conversation window and enter /xcolornick. "Show Code"-button at the topright.
Also try the commands in the "conversation window" -> "Plus!" -> "Plugins" -> ColorNickv2" they are quite useful