Can anyone make a guide or post a link of how to create your own scripts ? Like the definition of the commands and things like that?

there is no "easy" scripting.. scripting is scripting.. you need to learn the variables of it.. but no worries.. its not hard unless u want to make a hard coded complicated script...

personally..i use this site to get the syntax and stuff.. learned alot from the scripts in it :P

http://ltwo.insane-gamers.com/

also this is l2.net home , so ..check it :)