if you disabled the dhcp in the linksys then you would need to have a local ip address set in those same tcp/ip properties, i.e 192.168.1.100.
screenshot
http://screenshots.modemhelp.net/scr...Address2.shtml
you can find out your local ip by going to start-run and typing in winipcfg. it will show your local ip for your linksys nic.
you'll also need to set a gateway: 192.168.1.1
http://screenshots.modemhelp.net/scr...Address2.shtml
you'll need your isp's dns server addresses to be set in the dns server search order of the dns configuration tab. the host would be your username w/ your isp, domain would be your isp's domain, i.e cox.net, comcast.net, alltel.net, etc.
http://screenshots.modemhelp.net/scr...uration2.shtml
255.255.255.0 is the subnet mask, when you type in your ip address it should fill in automatically, but there it is.
once you've done that you're setup to access the internet through your router. you should be able to ping outside addresses through a command prompt. yahoo.com is a good yardstick because it accepts pings and is always up.
windown 98 itself is not really setup for broadband connections. working in dsl tech support, i see these tcp/ip glitches every day. its nothing for which you need to install windows 2000 as a solution. if you're upgrading anyway, that's great, win 2k is easier and more stable when it comes to broadband. you can get screenshots for win 2k at the same site.
http://www.modemhelp.net