netcfg
I have had success using netcfg to configure ppp dial-up.  You might want to
check out this link for step-by-step instructions:
          http://nitro.med.uc.edu/DR3web/netcfg.html

kppp
If you have kde installed, kppp is very user friendly.  

Before you configure ppp, you need to have the following information:
- isp ppp dial-in number
- domain host name of your ISP
- IP addresses of the DNS of your ISP

Quick tips to use "netcfg" with DR3
 * start an X session (startx) as root
 * start an X terminal session
 * type "netcfg" - see above URL for help
   - enter hostname, domain, and nameserver(s)
   - click "interfaces" and then "add"
   - select "PPP" and click "OK", then enter phone # and login info, click done
 * type "modemtool" and select "cua0" (modem port) or "cua1" (printer port)
 * type "usernet" and click on the button by PPP0 to connect
   it will turn green when the connection is active

The URL above doesn't work (at least not at the moment), but netcfg is available through rpmfind - http://www.userfriendly.net/linux/RPM/netcfg.html