I have an existing reseller account on Host "A"
And a customer wants to move their existing domain "stuff.com" from their old host "B" to my account on Host A.
I have their registration password so I can change the name server whenever I want to.
I have their FTP Login for Host B.
I've downloaded their entire site to my PC.
I want to set up their new site on my Host A.
Upload their site and check it first. Make sure the scripts still work etc.
Only after I've uploaded and checked their site do I want to move the Name Server to make the new location active.
How do I do this within WHM, because if keep getting the "name already exists."
Do I set up a sub domain which I can then move to a full domain?