First make sure that your ran ipkg-link on opie-sh and sharp-compat-libs. Now, in settings there should now be a green&purple icon that says "libraries." You need to click on that, click list, click applications, then select Opera. A box with a warning may pop up. Just agree to whatever it says and go and launch Opera from it's icon. It's possible Opera may not start the first time. If it doesn't just click it again and it should be fine. If that doesn't work try running from the command line again and tell us if it at least has a different error now. HTH.
One more thing: If you install any package to any place except "root" (aka /) you need to run ipkg-link before you can use it. If you just need to link one package you can use ipkg-link add package, if you need to link more than one and you don't remember their names you can just go ipkg-link mount /path/to/destination/
-John