deploy computrace to stolen computer

One of macbook airs was stolen.  We did not get a chance to install computrace before it was stolen.  We did get our management software installed on it before hand. We can deploy software, take screen shots and do just about anything else to it.  I am trying to get computrace installed on it.  I can transfer the computrace installer over to the computer. The computrace install notes say that I can install the software via command line but just starting the install.sh file.    They tell me I can just type ./install.sh in terminal from the same directory as the instlaler and then it will prompt me for the admin password.  When I send a command to run ./install.sh I get an error saying that install.sh needs to be run from the same folder as rpc.net.  rpc.net is in the same folder as install.sh.   Does anyone have a suggestion or experience with this?