Internet Connection Sharing (ICS) with 2 PCs and 1 host?

[Frank A]

Ok, here's the thing, I have a total of 3 network cards (1 for accessing the internet via a cable/dsl modem and 2 remaining NICs for sharing) in my PC (1 Wifi adapter) and running a windows vista. I need to be able to share internet with two other PCs in my network because currently I can only share an internet connection with one PC since I have an option here in my network settings to whom (which network adapter) I will share internet connection with. Hence I can only share internet with with the adapter which has sharing enabled in it so that leaves the other PC in the dark.

Anyone here knows how to share my internet with the other 2 PCs I have without the use of a router/hub??

Thanks in advance