installing while running existing website

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I would like to try to create/move several existing html/css websites to C5.
Currently, they are all hosted at godaddy and are running.
I have looked at some staging boards, but I'm not sure how to keep these running and install C5 so it doesn't overwrite them. I would like to simultaneously run both until I have my C5 version up and edited how I want. What is the best way to do that?

thanks!
Shana