Theoretically yes it should work as it is with the wireless card.
1) Install the wireless card / USB dongle
2) Go into the software for 1)
3) Setup a new connection and use the pass phrase which is normally on the bottom of the router.
4) That should then hopefully connect to the router. ie You can access it via your browser
If you have no idea on how to do this, it is going to be your stumbling block. Here's some instructions, but remember they may not relate 100% to your choice of wireless card. And that it assumes you have access to the router. You may be as well hooking the router up to another PC if you have a network card in one of them?
http://www.skyuser.co.uk/forum/view-wireless.html
The easiest option by far would be the network card. How old is your PC? Most PC's within the last 3 or so years should have one as default.
Hope that helps you.