[gentoo-server] off topic / pam module to mount windows share

Currently I'm authenticating users to our Active Directory domain, using Samba/Windbind on our Linux machines.  I need to mount a windows share and then autogenerate their home directories on that share, on login (currently home directories are created locally on login, and deleted nightly).  The only thing I had found that would allow me to do this was the pam_mount module.  I never quite got it to work the way I wanted it to, and after revisiting the site recently, I noticed that it's no longer being maintained.  Has anyone done anything similar, or have any suggestions?

Using another accounts database is not an option and pre-generating the homedirectories is not an option (40,000+ users and frequent additions/deletions).

Thanks,
Vern