Newbe: How to WDS/Repeater

I know this is not the right forum but I couldn't find any thread for WL520g. I have an Asus WL520g router, currently I have a fiber connection from my office to my home which is connected to WL520g WAN port. WAN has a public IP and through private IP (DHCP, 192.168.1.1/24) me and my family members are using it in our laptops. What I want to do is I don't want any DHCP/Private IP I want to use my office Public IP in my home aswell. Now how do I do that? say I have an IP range of 202.4.96.1/24. 202.4.96.1 is the Cisco router/GW. And say my IP at office is 202.4.96.12. One end of the fiber is connected to my office switch and the other one is connected to my WL520g. What should I do to configure it as same as office env? btw at office I am connected with a LAN/RJ45 cable and I use the same laptop.

Thank you in advance.