Configure IE proxy settings based on IP address

Hi,

I'm using a laptop with Windows 8.1. At home I use the wifi, at work I use a USB network adapter. I want to create a PowerShell script that will configure a few registry keys (IE proxy settings) based on my active IP address.

I know how to configure the registry keys, but have not yet been able to properly determine my IP address and execute additional commands based on that. I have been working with the Get-NetIPAddress cmdlet, but no joy...

I actually already have a .vbs script doing this, but I want to convert this into a PowerShell script.

Can somebody point me in the right direction?

Thanks!
Ashley.