Ok guys... Were there... He says with a prayer....

Ive still got the root domain pointing to the current host but we have set up the new private server and uploaded the latest files from the old host...

So, for the next 12 hours, im gonna point a few of my domains to :

ns1.1plus.net
ns2.1plus.net

Which resolves to the dedicated server.

Then, if all ok, I'll repoint the root domain.