Trinity - most all messageboards take a little settling in, and most of us are willing to help (though most use real Amigas so can#t help with UAE specific stuff).
Aaaany way, I'll try breaking down un-archiving stuff for you -
Step 1 - Download the LHA .run file
2 - run it from the shell
3 - copy it to 'Workbench:C' (so it can be run from anywhere)
Thats LHA installed, next:
1 - open a shell & navigate to where your archive file is
2 - use LHA to extract the archive (I use RAM:)
3 - go to where you extracted the archive to, and run whatever install script is needed.
Let me know how far you've got on this lot so far, and I#ll talk you through in more detail :-)
OS 3.9 has a graphical front end program called Unpacker thats does the extraction with a couple of mouse clicks, I don't know if AF6 includes it.