Unzip the Xgen-Aipoc file.
Rename Xgen-Aipoc to XGen
Take the XGen FOLDER (NOT the sub files) and overwrite your Xgen folder in macros directory.
If you dont have a XGen folder in macros directory, then just paste it in there. macros\xgen
To start type /macro xgen\xgen
type /cc for a full list of commands.
Read through them!