Hi!
It is possible for making? 
M0n0wall with 2 ethernet card, LAN connected to office network,
WAN interface connected to ISP. Over link WAN->ISP need create
pptp tunnel. How?

x.x.x.x(m0n0wall wan eth.card ip) -> y.y.y.y/y1.y1.y1.y1(router) 
-> z.z.z.z(ISP PPTP Server)
This sheme working now on win2000srv+winroute firewall, but on
M0n0wall 1.1 in WAN setup present only Static or only PPTP setup :/

--
Victor