Yeah Nour
You can get it done with NAT 0.. with NAT 0 , the zones would obviously see the same IP address between themselves.. with the newer IOS in ASA, you have a command "no nat-control" which negates NAT between zones.. the only thing is, with NAT0, if you enable it for subnet, any host/server on the zones will be accessed from the other zone.. with static NAT, you have more control on the network, with whatever you want to allow.. as an administrator, any new PC or component on the network will not be accessed unless you specify a NAT statement.. If i were you i would do a NAT for critical components, and then allow access, but I have also seen a lot of networks with NAT 0...
Thanks & Regards
Raj