[amibroker] Simplest method of creating Groups based on Symbol lists

[Homar Simpson]

 Wanting to setup Groups based on s&p 500 , Dow, etc.

 Read through the docs, but can't find a built in way of doing this
simply.  
  
  Can I assume you have to write some AFL code that reads a list?

  If so, I'm sure it's been done, and would appreciate it.