switching out my linksys router cloned MAC to wireless ethernet bridge

[c44me]

I currently have FIOS AP going to -> Linksys WRT54G router running wireless to a -> HTC running 1.7 attached to a -> Linksys Wireless-G ethernet bridge which has its MAC address cloned to the Linksys WRT54G router. It has been running fine for years but the router is beyond old....

so I just picked up a Asus RT-N66U to replace the old WRT54G.

how should I go about swpping the router out so as not to break my network? what should I do about the wireless bridge that is cloned to a router I am about to replace?

thanks!