Yes you can have an NTL connection as well as a dial up, I have it setup like that on my PC. NTL uses a LAN connection which will be the default. I would try and avoid using the setup CD you get with your dialup supplier. Log on to their web site and get the information you need to create a new dialup connection and then go into Control Panel, Network and do it yourself. Connect a phone line to your dialup modem and when you need the connection double click on it's icon.
Do you know that we're all in line for succession to the throne? Really? Well, if forty-eight million, two hundred thousand, seven hundred and one people died I'd be Queen.