> I'm set to obtain address automatically btw.
Which is the default during a Windoze installation. Unfortunately for you, that doesn't work unless you have a DHCP server in your network. Some Connection Sharing software can provide this service, but from your replies elsewhere it sounds like each machine has it's own dial-up line (the PPP adapter) rather then a shared connection. This adapter can obtain a dynamic IP from your service provider when a connection is made but that IP will not be visible on the LAN.
To get TCP/IP connectivity on your LAN then, you'll need to manually set an IP addrees on each machine. Assuming Win98:
For Win 9x/ME:
For each machine, right Click on Network Neighborhood and select Properties from the context menu.
In the dialog box that comes up, You should see among other things, two lines like "TCP -> Dial-up Adapter" and "TCP/IP -> 3Com Etherlink ... NIC" (Your actual Network card may be different). Select/highlight the one that refers to your network card, then click on the "Properties" button.
Change the Radio button selection from "Obtain an IP address automatically" to "Specify an IP address" then in the two lines below enter an IP address in the 192.168 reserved range. Most people use something like 192.168.0.1, 192,168.0.2, etc. Set the Subnet mask to 255.255.255.0 on both machines.
You should not need to change any settings on the remaining tabs for your simple setup. Do NOT change the IP settings for the TCP/IP -> Dial-up adapter - this needs to remain as it is or you will likely lose your internet connection.Select OK, and OK again. Windows will tell you it's updating, and possibly ask if you wish to keep/replace some files. In most cases you probably will.
When it's finished, re-boot both machines.
For Win2K or Win XP the procedure is slightly different
Right click on the Network Neighborhood Icon, then select Properties.
In the folder view that comes up, locate and right click on the "Local Area Network Connection" icon and select Properties for it. This brings up a dialog box which includes the line "Internet protocol (TCP/IP)" - highligth that line and click on properties, then proceed as above to set the IP address.
Hope this works for you.