OK, simple answers, if it works fine on the Sky dish then the box is OK.. How are you trying to line up the ross dish (just that it's hard enough to do it with a sat meter and just damn near impossible without one) mainly as half a degree out either way (up/down/left/right) can be the differnce between a picture and no picture.
The RS232 will be the way to update (which model is it??) you might have to get the update program & bin file from Ross but that shouldn't stop it at least being tuneable..
From the sound of it you have a fully working box just a misaligned dish. The way I would though install it if you don't have a meter is to attach it to the sky dish, fully tune it in and save the channels, check on the meter which channel has the strongest signal and leave it on that channel. Then using a grid pattern search put the dish pointing just below where you think it should be (mark the position then slowly move the dish left to right (about 20-30 degrees) pointing roughly in the right direction, no channels so move up the dish by a fraction then go left/right again.. keep doing that untill you get the channel you need.
Not exactly ideal and you need to either have a TV viewable from the dish or a walkie talkie contact with someone viewing the dish (shouting loudly can work as well
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