Question [Q] S3 as usb wifi adapter?

Hi,
During PC LAN parties with my friends, my Wireless card lags and skips (its a pretty old wifi card). I usb tether a lot and it runs really fast, but it uses a lot of data.

What I want to do is use my phone as a wifi reciever. I thought I could just usb tether to my pc, but instead of using 4g, connect my phone to wifi and use that, but when ever I usb tether, it makes me turn off wifi.

Is there any way I can do this? Preferably without using something like PDA net, but if thats my only option, ill use it.

I am using the latest version of "Clean Rom" and I am rooted running 4.3