Create a new FP web, (I don't keep all
the webs local, so I assign the location to www.root.com/whatever, instead of on my
hard drive) and use a new name.
Then again,
after reading the post again, you may be asking how to publish one web site to
two different locations. Easy, hit file/publish in Explorer, and type in the
domain that you want to publish to. DO this for each domain you want to put the
web site on.