you should just buy a home router. they are cheap and easy to setup. ICS is crap, i used it for a few months on my home network, but after having long delays, connnectivity issues and having to replace the power supply in the computer running ICS, i figured it was better just to use a device that is dedicated for that.
routers will let you do much more than ICS can, i doubt it will set you back more than $35 and it shouldn't take more than 10 minutes to setup on your network. and it will work with your tivo, plus you can have wireless access now
series 2 tcd2400800 250 gigs 285 hours monthly
series 1 hdr 212 160 gigs 199 hours
bye bye lifetime!