Thanks to the Author (Rainer Finck) that answered very fast to my question I solved the problem:

Just open a Konsole window and type:
sudo dpkg -i opera_9-0-20060616.5shared-qt_en.i386.deb

(FYI, this will replace Opera 8.54, but for me is ok)

A warning dialog is shown when opening Opera 8.54. Pressing OK does open the browser fine though:

"Plug-ins
==============
<!> Opera encounterd a problem during plug-in setup.
Plug-ins will not work properly.
Check your installation.

Could not start plug-in executable 'operamotifwrapper'.
/usr/lib/opera/plugins/operamotifwrapper-3
Please install Motif.

Plug-in path
(Path can be modified in Preferences dialog)

/usr/lib/opera/plugins
==============
[]Do not show this dialog again [Close]"

I fixed the bug that the appliance cannot be suspended if you use VMware Player.

Visit http://mba-update.colinfinck.de with any browser (but not Lynx) for instructions on how to update your appliance, so the bug will be fixed.

This is a really nice appliance but I noticed that conditional comments and PNG transparency don't work in IE (this is apparently a bug in IEs4Linux). Supposedly the latest beta version of IEs4Linux has fixed the conditional comments problem. Should I be able to just install the latest version of IEs4Linux in this appliance? Or will there be an update soon for this appliance?

I'm not sure who wrote the program, but I know that whoever is responsible for the website allowing me to download it has rendered it USELESS! If I can't download it, it might as well not exist. Is it a "virtual appliance" because it only exists as the subject of these comments and descriptions? It'll be nice to try if the site ever get's the problem working/even cares. But, by then I'll probably have forgotten this site exists and be using someone else's program or have written my own. Two hours of wasting your time can really put ya into a bad mood--maybe that's what this virtual appliance is supposed to do???