well i guess step by step will help for your wireless
1. Select an IP Address that is not used yet in your network (example 192.168.1.254)and set static ip on your printer.
2. exclude that static ip in your router. you will be required to provide the mac address for the printer too.
3. install drivers for the laptop.
4. test print
actually if your printer is set up as wifi, you dont need your printer to be hook on to the router. you dont need your pc to be connected using usb to your printer too. if your pc is connected wired to the router, it will print when u click print. hope that helps