Add "File Roller"/"Archive Manager" to right-click on Desktop

[Dave M G]

Ubuntu Users,

I can right click on the Desktop and under "Create Document..." I can 
create a new "empty file". If I open that empty file, it's opened with 
Gedit and treated like a text file.

I'd like to be able right click on my desktop and be able to select 
something like "new archive" or something, and either create a tar.gz 
file, or be taken immediately to the Archive Manager interface.

How can I do that?

And while I'm at it, I can't seem to find the "Archive Manger" program 
in any of the Gnome Panel menus. How do people usually start it when 
they want to create an archive?

Thank you for your time and advice.

-- 
Dave M G
Ubuntu Dapper 6.06 LTS