kmail and forwarded emails as attachement

Hi list! Can anybody give me a hint? I can forward emails as attachement quite perfect. It's smooth and elegant: Mark all messages to be forwarded and select "Forward -> As attachement". But if I recieve such forwarded emails I cannot really unpack them and store them as single mails. I only can view them, but I need them as single mails to sort them into folders. Only way is to save all attached mails in a own directory and then import them again into kmail. Thats really annoying... Is there no better way to do this? Greets, Daniel