Oh, on a CGA? I'd think the basics still apply but that you'd have to re-add fuel fairly frequently since the capacity is so small. Coals on one side, food on the other. Maybe with a fire brick or other barrier between them, and a way to monitor temps over the long haul.
What are you looking to smoke? I know it's been done on 18s before, but smoking on the smaller grills like Jumbo Joes and Go Anywheres is kinda a rarity.