How do I load film into my Argus seventy-five?

I just bought one at a local pawn shop. I think I can figure it out, but I would like step by step directions. It's a really cool camera. If you haven't seen one before, look up pics of it, its pretty sweet. Anyway, it was made between1949 and 1958, and it uses 620 film. I've never loaded one before, and 620 film is expensive, so I don't wanna blow a whole roll trying to load it or anything. Thanks for your time.