Steps bellow will get the fax client working, you will need either a CD or the i386 folder for the file locations though. I don't see any extracted drivers for this from MS.
To install Fax Client on the Windows XP Professional-based client:
Log on to the client as an administrator.
Double-click Add/Remove Programs in Control Panel, and then click Add/Remove Windows Components.
Click to select Fax Services, and then click Next.
If you are prompted, insert the Windows XP Professional CD-ROM.
When the installation is finished, click Finish.