The wireless card you got for your daughter's computer I will assume it is a PCI card? If I am correct what you will have to do is open the case up (Often a few screws on the back of the case), then you will have to ground yourself. One way is to touch a grounded object
or touch a metal part of your psu and/or case. Then you will need to locate an available PCI slot. If my memory serves me right that dell your be an ATX form factor so the PCI Slots will be at the bottom right. If Dell started using the BTX form factor then they will be at the bottom right. They are white slots. Take the card out of it's protective bag carefulle and don't touch anything that is gold and/or shiny. Remove the metal cover over the expansion slot opening. Insert the card into the slot and give a slight pressure untill it is well seated. Now power up the computer (BTW I hope you turned it off before starting and unpluged it) and install the drivers (the cd that came with the card.
Now for the router I will suppose that you have a cable modem with an ethernet cable doing to your computer. What you will need to do is disconnect this cable from your computer and insert into the WAN port (hole...) in the router. Then you can take a wire from the first port and plug that into your main computer. You will then use this computer to set up the router according to the manual.
Here is something I found at the Time Warner website.http://www.timewarnercable.com/corporate/p...networking.html
Also here are some nice videos on how to do this from Cnet.http://www.timewarnercable.com/corporate/p...networking.html
It has nice videos showing you all the little things like what a PCI Slot looks like ect...