Yes, that is what I mentioned in that other thread.
You will first have to obtain the OVF Descriptor, with the Descriptor you call the CreateImportSpec method.
Then you call the regular ImportVApp method. Via the Status in the returned HttpNfcLease object you can follow the progress of the import.
I have a script that uses this technique to import a local OVF file, but for an OVF via an URL I'm still struggling with certificates, proxies and firewalls I'm afraid.