How to install Joomla HBS Component
You can install HBS 1.5 component form Joomla site administrator area installation manager. (You can install HBS 1.5 without enable Legacy plugin)
Step 1: (For HBS 1.5 Package III you have 20 components and Modules & for HBS 1.5 Package II you have 19 components and module)
(Following image show HBS 1.5 Package III installer component and module)
Install first com_hbsusers.zip component from your joomla site administrator installation area.
Step 2: Then install rest of components and module
If you have any question regarding HBS 1.5 installation please ask your question here.