What problems are you having with the netgear router?
(Not sure if I am teaching you to suck eggs so apologies if I am) but have you updated the routers firmware to the latest revision?
http://kbserver.netgear.com/products/WGT634U.asp
---------- Post added at 23:45 ---------- Previous post was at 23:36 ----------
Ah - just found this snippet (taken from
http://kbserver.netgear.com/kb_web_files/N100981.asp )
Firmware versions 1.4.1.8 and 1.4.1.10 are certified for use with Xbox Live, later firmware will probably work, but has not yet been certified.