We are in the process of figuring out a way to let our customers demo our product. My thought was to setup a VM and a full install and let them RDP into it. Once they are in, obviously, we can't see what they are doing, as the screen will be locked. We don't really care what they do when they are in, as it will be locked down, but would like to be able to see their desktop in case they have a question for our support team while evaluating the product.
My question, is are there any 3rd party applications out there that will let me do this? I know it can be done with Citrix and shadowing, but that's not really feasible for this project.
EDIT: This is running on WinXp Pro
EDIT2: Please keep in mind that this desktop will be locked down to the max, the client will not be able to do anything besides run our software. They are not able to even open IE. I'm looking for something along the lines of a service that is running in the background that I can connect to.