Have a look at this thread GreekFreak, it refers to the Cryptic mount. but it would appear to be pretty close to identical to the Nokia.
I'm sure Nobbly will tell you how he got on with it as well.
One very easy step which helped me was to pay to have someone come and install it. But I can tell you that rather than adjusting the elevation of the mount and the dish for Astra 19 alone, as they seem to suggest in the manual, he did something akin to what the above thread seems to suggest, and played with it at Astra 28 and Thor until he was getting a good signal on both, which then brought all the other satellites into line.