VPN between 2 win 2008 servers

I have two win 2008 servers. I am trying to setup a VPN between them

to pass files securely. They are in seperate locations and both have

multiple network cards as shown below

Server 1

NIC 1 - Public IP (89.xxx.xxx.xxx)

NIC 2 - Internal IP (192.168.0.1)

Server 2

NIC 1 - Public IP (219.xxx.xxx.xxx)

NIC 2 - Internal IP (192.1681.1)

I want to setup the VPN using a preshared key not a secure certificate

between the two internal NICs.

I have tried running through the routing and remote access wizard but

cannot find a way to get it to work.

Can anyone point me in the direction of any online step by step guides

that will help me out here. I have looked but cannot find anything

covering the above example.

Thanks

Tim