Need hints for FreeSwan

Hi list, I'd like to connect a remote Win2K box to a internal LAN which has only a dynamic IP via DSL. I allready have dyndns.org domain, that gets updated on DSL login. Now I glimpsed at free-swan's documentation and - as far as I understand - the setup-guide says I needed fixed IPs und update the DNS with key info and so on. So it is not possible for me to use it ? I currently have: - SuSE 8.2 and the provided freeswan 1.99 on the gateway - Win2K SP4 on the outside boxes Later there should be 2 Linux gateways connecting 2 LANs but still dynamic IPs. Is there someone who could point me to a HowTo or at least verify that what I'd like to do is possible with free-swan ?