Unmanged client and Basic protection for server

Dear,

I am planning for a 4+1(4user and a server) environemt as 4 users will be installed SEP client as unmanaged, Also I like to install the Antivirus and Antispyware(Basic Features) protection on server.

I dont wish to install the SEP manager, let all of them run as unmanaged client including server. How to get the package with basic feature to be installed in server as unmanaged? 

Thanks,

APK