Skin
Simple as loading a ipk file (installation file) onto the box click install restart the box go to skin settings select the sly skin then reboot again and its loaded.
SlyQ - Chabs -
http://www.techkings.org/openvix-openatv-skins/89189-skyq-skin.html
Slyk skin - google "slyk - Yola" top site when you google it
you need to either put the ipk file on a usb and plug it in whilst your only on channels (not on a menu setting) then it should pop up with install plugins? something similar?
then simply install it.
then go to Menu > Setup > system > user interface > skin settings? then you'll see the skin there. navigate to it click ok then it will ask you to reboot gui.
boot then the skin will be loaded :)
EPG
I strongly suggest to save your EPG to a usb stick/Hdd & not the internal storage purely because it can slow down the response speed of your box if you load epg data onto it.
do you have cross epg / EPGImporter installed on the box? if not you will need to install them from plugins:
Menu > plugins > green to download plugins > system plugins cross epg or epg importer
go into the settings on the epg menu:
menu ? setup > system > EPG > Settings > location to your hdd or usb.
then go to the cross epg / epg importer plugin and do the same.
go onto the providers and select astra 28.8 then click save
download now for cross epg
and press yellow to manually import the epg from the epg importer plugin.
the rest regarding epg is self-explanatory - like when you want it to auto update etc.