If you have all the installers in your Command Center Download Path (see the Path tab on your existing Command Center installation), the fastest way to get the new machine up is to install Command Center on the new PC, copy at least the newest installer for each item from the existing PC to the new PC Download Path and execute "Install All" from the SONAR Platinum line time. This will install all the files in that tree. You will install have to install all the parts at the same level as SONAR such as Melodyne, DPro and Rapture. You will also need to download and install the XLN installer on the new machine to get AD2 up.
If you don't mind the download time and don't want to mess with copying the installers, the Command Center will fetch the files if they are not in the Download Path.