Menneisyys,
Found this over on ppcgeeks, coded in C++. works the same as yours but does not need mortscript. might be worth adding to your first post as an alternative? to quote the developer (and with thanks to same)
"Attached is a beta app that will set opera mini as the default web browser and open links when clicked from email, etc. The app has been tested to work in wm6. It assumes that java is at /windows/jbed.exe and the Opera mini app is the first applet installed. This app is similar to the mortscript version, but, is coded in c+ and does not rely on delays."
Just a heads up for folks here that this .cab file works great on my Dash with WM6.1. I do still get the nag/warnings the initial time Opera is invoked but other than that it works like a charm! Thanks for posting it!