Alternate community created guide with images can be found here wiki.frictionalgames.com/hpl3/community/scripting/codelite_setup_with_pictures
That should be it, you should now have three top folders in your project and a lot of sub-folders with various script files. Hps files should be color coded and parsed for completion as you open them in the project. If they do not, you can re-tag the workspace, project or the single file to see if it helps.
Start typing something, for example Entity (depending on configuration this can be case sensitive!) and a drop down should appear showing all the functions that begin with Entity and the documentation for each selected function. You can force things to appear using these shortcuts:
Info about Settings→Colours and Fonts→Customize→Styles→Edit Lexer keyword sets, Set 0 to Set 4: