You can basically do that using IT-Reach. It is called remote deployment. Besides clicking on the link, sent to them via email, they would also have to supply a computer name and password, both of which I think you can change on your first (or later) remote access.
If you are talking anything other than IT-Reach - LMI does not recommend, or support, the use of remote installation. Installs done over RDP (Remote Desktop Protocol) often run into problems, that can be solved by the removal and re-installation
directly from the remote machine. So, it does make a difference.
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KGHalbe
(DISCLAIMER: I am NOT an employee of LMI, nor do I have any financial concern in LMI. I am strictly a HAPPY USER of LMI products. I am using PC version and XP SP2. Other systems or versions may act different than described above.)