Creating a stable flight can both be a tricky and simple ordeal, if you just remember to place SAS systems on every stage without distrupting fuel lines it'll be fine (or so you'd hope) if not then there just a problem with how you've designed it, is there another way you can make it? a loop hole you can exploit? if so try it.
I think this may be taken care of by the KSP team in future versions, However, if you were to find where the pictures for the crewmen are i'm sure you could REPLACE them, but i don't know about adding something to the Still empty Crewmen tab.