I followed these directions posted by xenomorph150 (i use 172.16.42.1/pineapple for jasager and 192.168.1.1 for webif):
3.) Fixing Webif
You got two Webinterfaces on the Jasager.
First the Karma/Jasager one at 192.168.1.1:1471,
and Second the Webif/X-Wrt on 192.168.1.1.
In Webif, you can change things like IP Adresses and watch a bunch of data.
Easy configuration for your Fon+ if you're not so used to the CLI in Linux.
Now that you have changed the root password and therefor have access to ssh,
you can use putty to connect to 192.168.1.1
a) Opkg
echo "src X-Wrt http://downloads.x-wrt.org/xwrt/kamikaze/8.../packages" >> /etc/opkg.conf
opkg update
opkg remove -recursive luci-*
opkg update
opkg install webif
reboot
Manual
// Remove Previous Install
opkg -recursive remove haserl
// Download and move these files to the tmp directory on the fon using winSCP
haserl_0.9.24-1_mips.ipk
webif_0.3-4709_mips.ipk
webif-theme-xwrt_0.3-4709_all.ipk
// Install the files using putty.
opkg install haserl_0.9.24-1_mips.ipk
opkg install webif_0.3-4709_mips.ipk
opkg install webif-theme-xwrt_0.3-4709_all.ipk