ARRIS/SURFboard → Bridge + Router (2 x WA840GP)

Scenario
Hotel with wireless but signal is poor and can be received in one place only (e.g. @ balcony), as well wireless is limited to one MAC address.
Solution
Wireless is receiving signal (AP) from Hotel’s WiFi then bridged (by wire) to AP/router which broadcast my own WiFi, so I can use WiFi in Mobile phones and laptop.
How can I do this with 2x WA840GP (I'm familiar with the settings on this device)?

Thanks for any help!

Could not managed to make WA840GP as wireless client, and then I used much bigger (not perfect for holiday), WRT54G, with Tomato firmware. At Tomato WRT54G you can choose Wireless Client Mode, and then scan and see what network you can join, and of course you can change MAC address. WRT54G connected by wire to WA840GP, which is working as Access Point.
Helpful clue WAN port in WRT54G is not connected at all (routing through WLAN).
Job done.