That can certainly be done. The DOS version may even be booted from a PXE server. The Windows files may be download from a LAN or even a FTP server over the internet. However, you must still have a MUD (Multipurpose USB Device) in each system that is to run PC-Doctor. This assumes you are using Service Center.
There are products, such as license server from our factory line, which will allow you to license concurrent instances of PC-Doctor from a central server. PC-Doctor is so flexible and there are so many possibilities that I suggest you contact one of our sales engineers and discuss your needs in detail. I am confident we can get you what you need.
PC-Doctor Sales - 1-866-289-7237