I have installed a 120 day evaluation of Win Server 2008. I have some manuals and books on how to do various tasks on the server in preparation for taking some certification exams. Is there a way I can put this server on the network and setup some things but not screw up anything with our current network and Win Server 2008 R2? I will need to of course install roles and setup active directory and DHCP and an ip scope. In doing these things while connected to the network, will it mess up anything or can I practice in a way that will be safe.