IPTV on XBMC

Hello all.

Is there a way to connect an set top box to xbmc or maybee even better to stream IPTV channels on xbmc instead of streaming in on the set top box?
At home I have an Scientific Atlanta STB that streams TV channels. I can use VLC player to stream the channels on my computer.

It's working in this way:

The STB has an IP address, for example: 10.56.19.221
On the network card of my PC I have to set the same ip address as on the STB. In this example: 10.56.19.221

After that in the VLC player I go to: File / Open Network Stream / UDP/RTP Multicast

And I can insert one of the following ip addresses to se the channels (for example):

...
224.1.1.156 - Discovery Channel
224.1.1.157 - Animal planet
224.1.1.158 - travel and living
224.1.1.159 - Discovery civilisation
224.1.1.160 - Discovery Science
224.1.1.161 - DoQ
224.1.1.162 - MTV Base
224.1.1.163 - Kapital Network
224.1.1.164 - MTV Hits
224.1.1.164 - MTV 2
... and so on...

Is there a way to stream directly the channels to xbmc? What frontend and backend to use? how to setup this? ...

I don't wan't to baypass the payment of the service or anything like that. I only would like to have everything i one place.

Thanks.