Sample of what I'm trying to achieve: http://www.hamachi.cc/
Currently, one network is 192.168.1.0/24 and the other is
192.168.2.0/24. Both networks can talk to each other nicely.
A side note: would it be possible to enter a hostname instead of IP
addresses when filling in for the IPsec? This would save some hassel
whenever public IPs change.