QUESTION Site with public & private section

[jmstack]

Try these plugins.
http://get-simple.info/extend/plugin/fro...anced/809/
http://get-simple.info/extend/plugin/fro...login/202/

I did actually download and try several plugins...

However, the instructions for Front-end-login says:
Step 1:Drag The contents of user-login.zip into the plugins folder
Step 2:Protect Desired Pages
Step 3: Include plugin functions in theme

I have no problems with steps 1 & 2, but step 3 is certainly not self evident for me.
Admitted, my knowledge of php and the internals of GS is only very basic, but this has not impeded me in building a few web-sites with GS up until now...(including sucessfully using some plugins..)
/JS