IPSec for RoadWarriors on Windows using SIM/Smartcards?

[lir]

Hey guys,

I need a setup where my end users are running windows xp/2k and their keys or certs are stored in a sim card.
I found several 3rd party ipsec tools for windows which are iVPN, ipsecexe and lsipsectool.

I'm not sure how to implement it so that these ipsec clients will grab their keys out of the sim/smart card?
Also, I know that most of these 3rd party tools I've mentioned where designed for linux's freeswan/openswan/strongswan and
I'm not sure if they can work with pfsense as the ipsec server…

Any thoughts on this issue are most welcome.

Thanks,
Liran.