Setup Unattended Access Remotely

Hi,

I'm currently evaluating the software on a trial basis and have just one question. I figured out how to initiate a remote control session by having the partner download the temp. software and giving me their ID & password so i can sign in to their PC. What I need to do is be able to set up their PC for unattended access while I'm still signed in remotely. I tried to do it manually by downloading the regular software and installing it myself, but it won't let me do that while I'm signed in the other way. Is there a way for me to do this without being there in person? I've been trying to get an answer from Support, but am having no luck getting a response. Thank you in advance for any assistance.