This might sound like the stupidest question on earth, but being 
new to the RiscOS world (like 4 hours old) I am running out of ideas: 

I am following the README file for installing a RiscBSD kernel on a
machine running RiscOS.  I am at the point where I have !gzip 
from hensa and I have a inst-12.fs.gz file but I can't seem to 
convince the system to decompress the file for me!  What are the
magic mouse clicks required to achieve this?  I have tried selecting
the /gz file and double clicking on the !gzip application icon etc. etc. 

Any hints? 

				-- Puneet