Mike,
As long as the extracts are unhopped, they should be approximately the same as the pale and liquid extracts listed in the BeerSmith database. An entry of 1.036 is correct for most extracts, you don't need a hop alpha (0%) for unhopped extracts, and you can actually enter the color in EBC by entering "3.0 ebc" into the color entry - BeerSmith will convert it in place for you!
Brad