Im looking at getting a twin free sat box and have been told I need 2 cables from my dish to do this.
How hard/easy is it to take the old cable off and replace it with a new ''double LNB cable''(think this is what its called) this myself?
What is the cable called and where can I get it from?
Any info would be great.

RB, October 2010

Just to clarify, if you find that your LNB only has one output, you will need to replace the LNB as well, rather than just the just the cabling.

You can buy quad LNBs (doubles are not around these days) quite cheaply on eBay. If you have a Sky mini dish ensure that you buy one for a "sky dish".

T, October 2010

not that hard to do, you will need to check the way the old LNB is held on to the arm of the dish, if its a (sky dish) the LnB is pushed into the arm and held in by a plastic clip, just take the clip out and pull the old Lnb out of the arm, and slot the new one in" their the same size, just get the (right shape ) LNB so you can fit it back on or into the dish arm . do not move the dish even a little when your working on it, just get the right LNb shape that will fit your Dish arm , and you be fine .

w, October 2010