Boot a Bering floppy image. Once the LEAF menu appears get access to
the linux shell by (q)uitting the menu. Edit the syslinux.cfg
file and replace the pump entry by ppp in the LRP= list of packages to be
loaded at boot. Check the Bering installation
guide to learn how to do that.
Your syslinux.cfg file could look like (adjust
to your tastes):
display syslinux.dpy timeout 0 default linux initrd=initrd.lrp init=/linuxrc rw root=/dev/ram0 boot=/dev/fd0u1680:msdos PKGPATH=/dev/fd0u1680 LRP=root,etc,local,modules,iptables,ppp,keyboard,shorwall,ulogd,dnscache,weblet
The last two lines ("default linux ... dnscache,weblet")
must be typed as a single one in syslinux.cfg