Wifi without a wireless router?

The In-Laws are coming and they just have to have wifi! I have everything hard-wired now (PC, PS3, and Laptops) and I don't want to have to mess with all of that. So, is there a way to get wifi without getting and installing a wireless router? I saw a USB Wireless LAN on ebay. Will that work? Also, the... show more The In-Laws are coming and they just have to have wifi! I have everything hard-wired now (PC, PS3, and Laptops) and I don't want to have to mess with all of that. So, is there a way to get wifi without getting and installing a wireless router? I saw a USB Wireless LAN on ebay. Will that work? Also, the owner's manual for my PC said that I could establish a wireless network using my PC as a wireless access point. How do I do this if at all possible? I've got the little antenna hooked up already. Please Help! They'll be here in two days! Thanks and MERRY CHRISTMAS!!!
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