In B4i IDE, Tools, Configure Path, there is a Additionnal Libraries entry where you can enter path to your libraries (there are XML files on the PC part)
They wont show, I've already configured the path.
I extracted the libraries from the ZIP file and placed them each on individual folders per library because they have a 1.bil file witch are different per library so I did not know if that's replaceable.
Only the .bas could be put on a B4i Path, Shared Modules, if it is a shared module. The rest stay in each project directory .b4i is main module, .meta is an additional project file.