Nope, not at all... this is a set up disc for a Linksys Wireless G Broadband Router. If you have the router this disc is used for setting up your wirless network name and security. If you want to get wireless connections on your desktop you need to install a piece of hardware which is a wireless card in to your PC.
That is not possible, as it is stated in the support for Listia: How do I delete an auction?
You can only delete an auction if there are no bids on it. When you list something on Listia you should be designating that item to a winner on Listia. If there are no bids on the auction you can delete it under "My Account" then find the auction under "Auctions Listed".
Maybe you can contact them and ask them to cancel your bid. However, they maybe unwilling to since the listing is clear as to what it is exactly and not in anyways misleading to anyone.