just to clarify...
The main NTL feed goes into the cellar where it is split to go to the STB and then off upstairs to the SACM. I need to extend the run that goes upstairs so it reaches the loft which is where I will be putting the SACM - I will probably replace the whole run as I dont particularly want a join.
At the moment the cable modem feeds into a hardware firewall and from there into a switch to feed the rest of my network. I have a wireless AP on the switch that is used for internet access via my iPAQ and laptop.
Off now to browse the Maplin site to get some cable and connectors
thanks for your help!