I think the direct boats to PG are still Tuesday and Friday, but there should be daily boats from Livingston to Puerto Barrios, and from there three boats daily -- Requena's, Pichilingo and Marisol -- to PG (10 a.m. and 2 p.m., US$20 to $22, plus the 80Q Guate exit fees.) At least that was the case a few months ago.
--Lan Sluder