
Besides, I've found a way to install Opera silently in a folder by your choise.
Well, maybe there's nothing special in it, but as I see, you install it in \Opera 8 beta, that is not very aesthetic, as for me
So, here's the way - create .reg file with the content like this:
CODE
Windows Registry Editor Version 5.00
[HKEY_CURRENT_USER\SOFTWARE\Opera Software]
"Last Directory3"="C:\\Program Files\\Opera"
"Create Startmenu icons"="1"
"Create Desktop icon"="1"
"Create Quicklaunch icon"="1"
"Last Beta Directory"="C:\\Program Files\\Opera"
The parameters are self-describing

I import this file before installing Opera and voila! It installs in \Opera folder, not that foolish \Opera 8 beta or \Opera7.