Yes yet another fool who can't sort this problem out

Right bit of background for ya i currently have the NTL analogue cable setup with the Jerrold Box thing which does a great job but its getting expensive to have analogue now so i want digital (yay!). The only reason i haven't switched is in my current setup the Jerrold box feeds 2 other TV's channels 1-5 and the channel on the box at that time. Its my understanding that if i switch to digital i will only get the channel thats on the box at that time, is this right? I read another post about the whole thing and got very confused. All i want is my current setup to work under digital what u reckon chaps?
Signal Route:
Cable Box > VCR > Signal Booster/splitter > TV
Many Thanks