SID is the channel number,so,tune the channel from the channel list,a scrolling definition for this channel shows up at the bottom,take note of SID in HEX.
PMT value is a little more difficult,but nonetheless is available in the stream,you have to ask a friend with a dreambox or so to look for that value in INFORMATION menu,for example (not the only method,a dvb card should also tell you)
Then you enter the key.
There is no more to it.