How to download Opera to Kubuntu 8.04 LTS?

[Larry Alkoff]

I would like to add Opera to this computer
and have downloaded opera_10.63.6450_i386.deb.

When I try to load the file with:
   sudo dpkg -i opera_10.63.6450_i386.deb
I get complaints that
gstreamer0.10-plugins-good is not installed
and the installation stops.

There doesn't seem to be any such package in the repositories when I invoke
    aptitude -vv show
which usually works to give information about a package in the repositories.

How can I install Opera?

Larry Alkoff