Pastor Terry,
A dial up connection and an Ethernet card have nothing in common. They are two different products.
You need a regular modem for you dial up (you already have one) and an Ethernet card could be used for networking, high-speed modems, networking, other applications (like KPro), or nothing at all.
You do not need access to high speed Internet access to have an Ethernet card.
You DO NEED an Ethernet card to run Kpro 4.008!
Rest assured that your Ethernet card, internal or USB,
WILL WORK for you. 
Good luck,
Jon