I originally posted this reply in another thread, but it seems appropriate to add it again here:

1. Start X-Term as root
2. Install your version(s) of Java and MicroEmulator to /home/opt/. use chmod +x java to grant executable rights.
3. Create a symlink to use Java from the command line:
ln -s /home/opt/java/bin/java /usr/bin/java
4. Navigate to: cd /usr/share/applications/hildon
5. Use the ls command to list the .desktop files in the folder
Copy an existing file with a new name:
cp x-chat.desktop microemu.desktop
6. Using Leafpad edit the file: leadpad microemu.desktop
7. The edited file should look something like this:
[Desktop Entry]
Encoding=UTF-8
Name=MicroEmu OpenJDK
Comment=MicroEmu OpenJDK
Exec=java -jar /home/opt/microemulator-2.0.4/microemulator.jar --resizableDevice 800 375 /home/user/MyDocs/opera-mini-4.2.jar
Icon=xchat
Type=Application
X-Osso-Type=application/x-executable

Change the icon to anything you like

Save the file and look in the applications menu for the new shortcut. It should launch MicroEmulator full screen with Opera Mini ready to start