netsh ipsec l2tp psk pap

Security Gurus,

I need a netsh command(s) to connect/establish IPSEC/L2TP. The VPN server is linux, with radius server configured. Need to use both psk and pap with userid and password submitted in the netsh command.

If forced to choose an option, pap is a must in my case;

Can someone point me in the right direction on how to accomplish this? [yes, looking at more recent versions vista, windows7/8 desktops, where netsh is bundled with ipsec, advfirewall, etc.]

PS: Dont worry about userid, passwords from security perspective with PAP. We have a way to deal with them.

Thanks a bunch in anticipation.