I have never used an I55 box, so I don't know the exact steps on that one, I have done it on an H2s and it's basically just installing the IPK file onto the box and then change the skin. Once the skin is on there, it will look like the Sly epg that you are looking for. I'm sure someone will be along soon who has the same box as you and can confirm the exact steps.
I don't want to confuse you by explaining how I did it on an H2s and then it be completely different on your box, sorry.
Maybe have a look on YouTube, there are always plenty of videos on there.
Good luck with it all!!