hehe HI THERE!! go here:
Boa Constrictors This site should help you out just a bit. As far as classification goes... none of those are listed under imperator. Here is why:
Genus: boa
species: constrictor
subspecies: constrictor, imperator, occidentalis, nebulosa, ortonii, longicauda, sabogae, amarali, orophias, melanogaster
Now, for ssp constrictor and imperator, there are different "locales":
constrictor: Guyana, Suriname, Peru, Colombia (rare), Trinidad, Brazil, Venezuela
Imperator: Colombia (common), Hogg Island, Mexico, Belize, Nicaragua, El Salvador, Costa Rica, Honduras, Ecuador, Peru
Does that help some? How's the brb doing?