Vista - remote access LAN hyper-V outside office

Dear All,

I am a CLOUD provider. How I can assign a VM to a customer (no Real IP for
hyperV server but also the VM guest) such that he can remote control it?

I installed a SCVMM and he can login the self-service portal and see all the
machines which i assigned to him. However, no matter "connect to VM" or
"Remote Desktop", it prompt me: VMM failed to connect to the vm because the
domain name could not be contacted.
(Certainly, they all internal IP - 192.168.X.X, such that it can't be access
remotely.)

What I did:

NAT the SCVMM Server to a public domain and opened the portal port.

If I want to do this, how can it work?

thanks.
AlexLiHK