Intrigued by this post as I do a fair amount of remote support work myself I thought I'd investigate further.
A quick search found the following software -
Daemon Tools USB.
After installing Daemon Tools USB on my host computer I plugged in the PC Doctor USB Test Device and shared ut via the Daemon Tools software. I then made a remote connection to a test PC via Teamviewer.
I installed Daemon Tools USB on the test computer and added my Host PCs details via the Remote Devices tab. I copied the PC Doctor setup files to the remote computer and ran the setup choosing the run from CD option.
PC Doctor opened and went through the Hardware Detection stage with no problems. Then I ran the System Tests from he main menu and they completed without a hitch.
Looks like I can now add PC Doctor Hardware testing to my remote support services.