Linksys Cable / DSL :: WAG54GS Need Wireless Signal To Reach Each Guest Room

i'm setting up a wireless network for a local B&B they currently have a Linksys WAG54GS ADSL router in one of the rooms but need the wireless signal to reach each guest room the house has thick brick walls and an upstairs.i was thinking of using 2 x repeaters, the WRE54G's, and to put one on the ground floor within range of the current ADSL router and to put another on the 1st floor within range of the repeater on the ground floor to receive the bounced signal.I don't know much about these repeaters and how they work exactly and so unsure if this would be a viable solution in my case.