Populations are taken from the cuban census projections from the government in 2006, except for Villa Clara which only had info from 2005. I basically had to download a pdf file from each province and hunt for the info.
Here's the main Cuban site I used for the populations:
Oficina Nacional de Estadísticas. Cuba
The latitudes and longitudes are from wikipedia.
As far as the complete list, this is it. It will replace every current city for Cuba. Every city has been updated, if it hasn't been replaced, so you will just need to delete all the other cities from Cuba and add these. I can also send you in what municipality each team in Cuba plays so they can have their accurate city info for the release.
Next step is updated weather info for each province, that's also in the province pdf's, so it should be easy enough. I just need to know what the rain % is based off of. Is it based on total rainfall, or # of days each month?