To do it right and have a comfortable, quiet and efficient system you need to call in an expert in duct design and lay out. All too often forced hot air systems have gotten a bad rap due to bad ductwork. There are whole engineering volumes written about proper duct design and air flow. Without knowing the heat loss and gain figures, infiltration factors and accruate framing and room lay out it is all but impossible to do anything other than guess at things. Guessing at things generally turns out badly. If you are expecting someone online to do for free what they would certainly charge for, I'm afraid you are going to come up dry. Nice drawing program though.