Ok, with standard OS you may not have the wizard. Here are the steps to do it manually.
Server Address Objects:
1. create 'dvr private' assigned to LAN zone for ip address of the dvr.
2. create 'dvr public' assigned to WAN zone for some other public address you have available.
Server Service Group Object:
1. create 'dvr services' with http and https (if used) services.
Server NAT Policies
1. Create inbound Server NAT policy to rewrite packets to original destination 'dvr public' to tranlated destination 'dvr private'.
2. Create outbound Server NAT policy to rewrite packets from 'dvr private' to translated source 'dvr public'.
3. Create loopback NAT policy to allow access from all internal zones to the server at the new public address.
Server Access Rules
1. WAN>LAN Allow 'Any' to 'dvr public' for Service Group 'dvr services'
If you have any lower security zones, you might need to add those as well.
This should do it! As you can see, using the Public Server Wizard is a lot easier.