This is a short guide, where I will explain what is needed to get onto the North American servers from Europe.
Buying the kit
First of all you will need to purchase an American playstation 2 (NTSC) and a NTSC version of socom II.
There are many import sites out there, though the one I used is
http://www.importmadness.co.uk
Including shipping the whole thing cost around £170 obviously it depends on the exchange rate at the time.
You will need to make sure your tv supports 60hz for optimum quality.
Connecting
When you connect you will most likely get the message "The network configuration was made for a different ps2 and cannot be used". This is easy to sort out, on the online screen you click on edit network configuartion and go make a new one. You will be told to delete your one for your PAL ps2, you will have to do this everytime you connect.
To solve this it would be wise to buy a new memory card to avoid this, though it only takes a few minutes, and I dont think its worth £20.
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This may have seemed obvious but alot of people have asked me.