Hi there. This will definitely solve your problem.
You have the wonderful Apple TV now...
1. You will need a HDMI lead. You can buy these at your Apple store or even some supermarkets.
2. You will need a scary to scary lead.
3. Finally you will need a HDMI to scart box. This one will do nicely
4. That's it. Your Apple TV will work well with the Avant
Hope this helps,
Paul