Xbox 360 game patches without internet connection on Xbox.?

I have internet but I can't connect my xbox 360 to it. I don't wanna bother going to my friends house to do it there and I have been searching a lot to find a way to download game patches (specifically for Fallout New Vegas) and have found this is the closest I've come to find what I'm looking for (http://support.xbox.com/en-us/pages/xbox-360/how-to/update-xbox-360/system-updates.aspx) . But when I do that (I used a usb and did the steps correctly) nothing happened, which leads me to believe that that download is just for dashboard updates. I haven't been able to find any game patch downloads of any kind on the internet for Xbox 360. If anyone can point me in the right direction or even give me a direct link it would be much appreciated.