Could you tell us What OS (e.g version of windows) the laptop is using.
Is what you need to do is install the driver for the wireless card, (it will either be on a cd supplied with the card or if you know the model you should be able to get it from the netgear site)
then login to your voyager 2110 from your pc thats connected via the wired lan by typing
http://192.168.1.1
Click advanced and then advanced again on the screen that comes up
Click wireless, a box will come up for a username/password enter your user/password
(if you haven't set one the default is admin for both username and password)
Choose an SSID and tick the enable wireless box (the SSID is what the wireless network calls itself) then hit apply.
Click on encyption and select WPA-PSK or WEP (Wpa-psk is more secure but due to the age of your wireless card it may not support it)
type a code in the box (this is so only people who know the code can join the wireless network, it might be worth writing it down or setting it to something you can remember)
click apply
Reboot the router if necessary (it will say if it is)
Now insert the wireless card into the computer and it should show a network with the name you set in the router (SSID) and then when you try to join that network use the code you set under the encryption options in the router.
EDIT: Resized Screenshots