These scripts will simulate a user session as if they have never logged in from that machine before - it makes no assumption of cached data. It'll be your worst case scenario for that reason.
The biggest problem that people have with the ESP is sending up the right headers. Taking a network sniff will help you here.
My caveat here is that I have not touched these in a while and they may be a tad dated, but they will get you going. The documentation should get you the rest of the way there.
Did this help you? Let me know. Want something major added? Let me know - I'd be happy to change them if it really helped folks. I'm passionate about my product and anything I can do to help you guys deploy it and be as passionate about it, I'm signed up!