Hi Luis,
You are correct that you need a NAT 0 statement for this traffic. Assuming the 192.168.0.0/16 network is on the "inside" interface, the config might look like this:
access-list nat0acl permit ip 192.168.0.0 255.255.0.0 192.168.5.0 255.255.255.0
nat (inside) 0 access-list nat0acl
-Mike