when connecting phone "Internet Sharing" Help

[kholy]

So when i connect my phone to my PC i get 3 options, disk, active sync, and internet sharing.

Well internet sharing caught my eye because i have a Dock in my car which connects to my CarPC and i would like to share the internet between my TouchPro and my car.

Well i tried this option "internet sharing" at my work pc.. and all it did was connect to active sync like before. do i need a program like pdanet or will it work with internet sharing