WPS set up with wireless repeater (edimax )?

hi guys

i have a edimax wireless repeater with wps support and a O2 wireless box also with wps support... now i want to set up the wireless repeater to get a better range in my attic... however can i use the wps button on both devices to set them up.. or do i need to run the set up disc and enter the ip address and mac address

what im planning is to connect my pc in the attic to the repeater using a network/ethernet cable for better range

so can i use wps .....?

any help is much appreciated

cheers guys