Hello, I have exactly the same promlem, but I am a complete linux newbe. I found the directory /etc/modprobe.d/ easily enough, but I don't have an 'options' file, and for the life of me I can't work out how to put one there. If I right click or go to file the 'create new document' option is greyed out. I figured I might need to log in with the admin password to do it, but I can't find where to do this.
I'm using channel 10 at the moment, but I'd like channel 13 as I get a better connection. I'm running Mint 15 Cinamon on an HP 6735s, I already had quite a lot of greif getting the wifi to work in the first place (the soft button to turn it on wasn't working), so I'm hoping someone can walk me through the process without me breaking it. Thanks.