PPTP and SAM and OBSD?

[carl@bl.echidna.id.au]

A friend of mine has a M$ network, and a OBSD firewall (IPF).  He wants to 
access his LAN via PPTP, a scan through the archives shows reference to PoPToP,
but I can't find anything about it on www.openbsd.org.  He wants to 
use SAM (some M$ auth setup, I think) to authenticate
his PPTP users.  Again, no luck looking for it on the lists or the website.

Can anyone suggest where I shuold look in order to give him advice as to what 
he can do?

Thanks

Carl