Awesome I want my legos back they was all lost in an house fire, all i have now is a modern art melted plastic pool
and since i heard the bad news i've been playing with the Lego digital designer thing (google it) and i bet there is noway you could make one on there. Best thing about it is, if that guy does you can buy the parts used and make a instruction guide from the programme as it has a step by step maker thing.
also when I was at primary school 4-11 age the head master asked us, what we want to be when we grow up I said make lego kits and I still do.