UrBackup creates VHD files for images which should be mountable directly from Windows. Conjecture: If the image is compressed, I believe you have to decompress it before you can mount it.
With newer versions of UrBackup, each partition gets its own VHD file, so restoring into a machine would require restoring all the partitions.
There is a Restore CD for UrBackup that runs a version of Linux. There is an article that describes mounting the Linux and using it to restore the files from the command line.
If you combine that with mounting the USB Device from the UrBackup Restore CD by using the Ctrl+Alt+F2 keys at the Welcome screen, you should get a terminal.
Here is an article that talks about mounting the server (assuming the same network), but I would think that mounting the USB with the correct folder should work.
The real question is how do you do that remotely… the only thing I come up with is either:
A) Use an IPKVM to remote over to the machine booting from the Restore CD with the USB Drive attached
or
B) Fork the Restore CD to start an SSH server and allow some sort of remote access via SSH. I don’t know how to do this, but it seems plausible.