moving home with sky taking old box

Hi all new to forum so i hope you can help me.Getting sky plus hd installed at my new home on wednesday £49-00 for box and £15-00 installation.Also subscribed to multiroom for £9-75 mth.The salesman from sky said as i was in a analogue switch off area as even the terrestrial tv is rubbish he would give me it for £4-87 mth (multiroom) i bit his hand off.My question is sky asked me to take my old pace box with the card in it from my old house to use as the multiroom boxin the new house.Will the card still work??? second question is if i get hold of another pace box and run another cable from that to the remaining slot on the quad lnb i guess i will get free to air sat channels.So where can i get another sky card from so the kids can watch different channels in their 2 rooms while we watch skyplus hd downstairs.please please help. was going to be cheeky and ask the sky engineer for an extra digestive to run the cable for me.

sky will give you another card for a third box but it will require another multiroom subscription at whaterver rate you can get them to agree to either £10 or £5 dicounted again

you'r right about free to view channels without sky card