[phpOpenTracker-User] Help with phpOpenTracker

I spend all the day working on this and I couldn't make it work properly, Maybe you can PLEASE answer me a few questions? :)

1-When it say : " include phpOpenTracker.php in your PHP application and then use its phpOpenTracker::get method " Do you mean in the php configuration? (Because I don't think I have acces to that file, I'm useing shared hosting account)
2-I'm trying to get the stats for some websites that I give manteinance, so when I suppose to call the image.php and webbug.js those have to have the entire URL to the script? like: http://www.otherwebsite.com/......./webbug.js ??
3-How is each external web site defined, with the "http://www..../image.php?client_id=1" tag? or with the "var client_id = 1;" in the webbug.js??
4- I can use names instead of numbers of clients ids, like: "client_id = client1"?
I apreciate all your help.

Regards

Alvaro Duran