Free easy to install and setup VPN

I have a Red Hat 7.1 Server I need to install reliable easy to setup and configure VPN software for “Road Warrior Users” how will have dynamic IP address. Can some one please advise me on:

I need to be able to access a Win2K server that sits on the network.

My Linux server is running Samba.

Oh I also dont realy know how to use Linux so I need a very easy prefered short docs that will basicly set it all up for me:) (I dont wont much do I:)

I have been using Microsoft ISA Server which is very easy to setup and config for VPN however cost a lot so I am looking into a Linux soloition to make it cheaper.

Need help ASAP.

Thanks…