Admiral558 you are a very easy person to help because you provided us with everything we need to help you. what you want to do is accomplished through ICS which stands for Internet Connection Sharing. the ICS software and even the firewall software is already built into winXP. win2000 also has ICS but no firewall software.
the hardware you need to share 56K differs from sharing broadband. all you need is a simple HUB or switch, there is no need for a router since all connections go through the 56k modem on 1 computer and all other computers go through this same computer to access the internet.
what this means is 1 of your computers must be an internet server and must be turned on whenever you want to use the internet. all other computers access the internet through this single computer. if the internet server is turned on but not dialed into your 56K account and another computer tries to access your internet, what will happen is that you internet server will automatically dial it up on request from the other computers.
what you need to do to set up the hardware is have 1 computer with a 56K modem, this is the computer that will be serving up the internet connection. any of your computers is capable of this. you need to have network cards installed on all of the computers, i am sure they all have one already.
plug the network card from the internet server into port WAN or port 1 on your HUB or switch. a switch is better than a HUB so choose that if you need to buy one. all other computers plug into ports 2,3 or 4. some switches or HUB have more ports than this. the other computers would never plug into ports 1 or WAN because anything plugged into WAN will disable port 1.
i think these show you how to setup ICS, also you should click the start button and click "help". search for ICS. if you need more help let me know.
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to setup ICS on winXP:
http://www.microsoft.com/technet/tr...prodtechnol/winxppro/reskit/prcg_cnd_xham.asp
ICS setup on win2000:
http://www.microsoft.com/windows200...000/en/professional/help/HowTo_share_conn.htm