'Remote' install of NIS 2010 5-user

Hi,

 

I have purchased the NIS 2010 5-user pack and installed and activated it on it on 4 local computers.

 

I would now like to install and activate on a remote computer without shipping the install disk to the remote site.

 

Can I get the remote user to just download a trial version of NIS 2010 and then get them to use the product key that I have for the 5-user license to activate ?

 

Thanks,

 

Trevor