You have dual onboard network adapters. You have to install the driver for the one you plan on using, I'd install the drivers for both if they are both enabled in the bios. If you don't have a CD, you have to download the drivers from the Asus website. The Linksys CD is for the router, you don't need it.
To remove the 1394 adapters, just right click on them.
http://www.asus.com/support/download...xp.zip~zaqwedc
http://www.asus.com/support/download...xp.zip~zaqwedc
http://www.asus.com/support/download...33.zip~zaqwedc
http://www.asus.com/support/download...28.zip~zaqwedc