If your linksys router is a stand alone box and the connection to the ebox is a cable then you should be fine. However if as the previous poster (sixstone) said if the Linksys is not a separate stand alone box but a wireless access device that is directly connected to the ebox you may be toast.... How ever I think you have the stand alone linksys router, I have several WRT54G's of various flavors and versions.
-jeff