Jaycar also sell a 4ch which can interface into pronto but if you want to use four cameras it quads the screen so the image is pretty small. Better of using 1 per camera and then you can have full screen image of each cam.
[Link: jaycar.co.nz]

Any server will work as long as you no how to query it. The Ness one and the Jaycar one both use the same so it may be a common thing.

If anyone wants a copy of the script with the query line in it email me and i will send it through.

danieljgor.... Ness server has a different code than the one you posted. See:
[Link: ness.com.au]

I have sent the script to your email. Let me know how you get on