Go here:
[link|http://support.dell.com/filelib/Devices.aspx?Category=0&OS=LNUX+&OSL=EN&SvcTag=&SysID=DIM_PNT_P4_4400|http://support.dell....D=DIM_PNT_P4_4400]

If that link doesn't work try going to [link|http://www.dell.com/|http://www.dell.com/] and pick customer support, home user, downloads, and choose your model Dimesion 4400, and then Linux for the OS.

To determine the hardware on the Dell, you may have to use some form of Windows to run the control to scan your hardware. Unless there is a way to give them the service tag and they can tell from that.

Or you can go here and enter the service tag:
[link|https://support.dell.com/productselection.aspx|https://support.dell...uctselection.aspx]

Then do a search on Linux or whatever OS you want to install. Download the drivers to a different machine with a CDR drive and burn them to the CDR. Use 4X speed burn to ensure the drive will be able to read it.

BTW IIRC Windows 98 came out in 98, SE was the first service pack for it. 98 Support ends in two months, or so I am told.

I wasn't clear if you wanted 98 or Linux or both, or whatever on the machine. Entering the service tag, it can be found on the back of the system box, will tell the Dell search what hardware the system has. Do a search on 98, Linux or whatever OS you are trying to install and grab the drivers for that OS.

Modems are cheap these days. You can get a Lucent chipset Winmodem for $20USD these days.

If the modem is on a PCI card, take a look at the FCC-ID and then do a search on it.
[link|http://www.fcc.gov/oet/fccid/|http://www.fcc.gov/oet/fccid/]

It will tell you the company that made it.

See if you can figure out what the part number is for the card, and get it from the OEM that made it for Dell.

I used to have to do that for people who bought Gateway and Packard Bell systems that lost their driver disks and had the hard drive crash on them. Most Packard Bell cards were Reveal or Aztec audio cards, etc. I used to have a Geocities Reveal Windows 95 site with the drivers I collected because Reveal was out of business.