l2phx scriptin

Hello, i was asking in english forums, but i got not responses. Do you have any good phx scripting tutorial? All i need is to know:

1. How to check every incoming packet (i want to make functions which will handle most of the important packets)

2. How to prepare and inject packet using ONLY script

It would be nice if u say me structure  "buf:" , "pck[index]" and "if" functions, im good at c++ but here i cant get anythin. Thx in advance