it would be wierd, but LINKSYS WRE54G Wireless-G Range Extender might work in combo with ICS. i know it does work if it were wireless signal from another acess point such as a router to then it will send signal to wireless devices to avoid cable runs. but i never used a pc to share out the internet connection over a wireless card, when a high speed connection connected to that pc via cable. i would instead just use a wireless router with the range extender.
did i even read that right or you mean verizons wireless via a pcmcia card, to use ICS to send it over a cable connected between that laptop with the internet to the access point in another location which the 2 wireless pc will get signal from...