A couple options:
1. You could setup everything but vcenter, export the DB for vcenter, and import into the new database server. Shut down original vcenter and install Vcenter and point to imported DB.
2. You could build it up in parallel and get everything functioning. Setup your clusters and permissions just the same. Then, unregister and re register your hosts into the fixed Vcenter.
If you have your hosts on a DVS you would need to migrate off the DVS to a standard switch before unregistering. Also, you will not be able to use the existing Vcenter name due to conflicts. Whatever name you build your Vcenter as is what you will need to keep it as. It is not recommended to rename Vcenter as it can cause issues with ADAM services etc.