Alrighty, scripting is overall, quite simple, however when you're just getting started, it can be a little bit difficult. If you haven't yet, I recommend going to look at the wiki, perhaps this page will help:
http://wiki.frictionalgames.com/hpl2/tutorials/start
From there, you can find a few tutorials on some things, and some videos as well if you don't want to just read slabs of text. You can also, if you would like to get an idea of some of the things you can do with script, this page has every script recognisable within HPL2:
http://wiki.frictionalgames.com/hpl2/amn..._functions