Whats the cost of this humax box then chaps :-? I have read that you can use your sky dish to run the freesat box off. Just wandering if sky and freesat signal are in tha same sort of direction. As Im stuffed if I need to move the dish as its shared with the neighbours and Im sure they wont be too happy if they lose their sky channels cus Ive moved the dish.

You can get a Freesat box non record version for £50 or so. I paid £230 for the Humax 500gb.
Where you have existing internal cabling - the LNB out on the Humax (you have 2 LNB in as said by Entwood) can be used to take the Freesat signal to another location via decent coax type cable. This is an alternative to running separate feeds from the dish but is less flexible. You still need a Freesat box in each room but if the master unit is switched on the you are limited to channels with the same polarity (Horizontal or Vertical )as that to which the master Freesat box is tuned. When master box is off you have full range on slave box.
This works fine for us as the 2 boxes are never on at same time.
Best solution is as said by Entwood to cable other rooms direct from dish - I have probably suceeded in making this seem over complicated - I was just making the point that there is a work around of sorts which I am using as I had the pre exsiting internal wires..