Whoops sorry I linked to the wrong post. Here is the correct one: RE450 as a repeater - #3 by bobafetthotmail
Quoted:
Ok, just tested, network -> Wireless, make sure all radios are enabled, then press Scan, and then select the network you want to join, and click "Join network", then it will open a guided setup page where it asks you only the basic info to set up a new client network and then it generates a new client network for you saving the manual process I outlined above.