if you don't know how to set up a network, don't request for the self installation kit. trust me, you learn more by watching and talking to the technician than messing with a bounch of hardware and hopefully they'd work together. that's like trying to OC when your idea of buying a rig is to call up dell.
now if the isp(road runner) doesn't offer on site install, here's some instructions:
you said your isp is road runner, in which case i am guessing is a cable broadband provider. the box they gave you is mostlikely to be a cable modem. now what you need to do is check on the back plate and see what kind of connectors you have. if ht has a usb cable connector, then you are on easy street as most pcs have usb ports built-in on their mobo. you need to plug the power adapter into the electric socket, plug the round end into your cable modem, then plug your cable line (coaxial cable) in the port that looks like what you have on the back of your tv, wait for the "online" light to turn on, install road runner software on your computer, plug in the usb cable and you are done.
if you don't have usb connector in the back of the box, you will have to goto local computer store and buy yourself an ethernet card. i would recommand a linksys card as they usually either use ne2000 chipset or tulip chipset, both have been well supported in windows and other oses. open up your pc, install the NIC, load up the drivers, plug a regular cat 5 cable in both the cable modem and the NIC and you are done.
if you have dsl, it is basically the same thing except instead of coaxial cable, you plug a phone line in the back of the modem.
when you are done with hardware and driver installation, goto network configuration and enable dhcp client(obtain IP information automatically) and configure IE/firefox to use LAN(local area network) and you can browse webpages.