@fckopera
You mean old Opera Presto (version 12 or so)? It can't import any of your current settings and IIRC won't update to newer version either.
But you may have some problems with it. I'm using Opera 10 sometimes, for speed and some other things - it doesn't support some newer cryptography (certifcates), its javascript is sometimes very slow or simply doesn't work, its rendering can be erroneus ets; maybe Opera 12 is better in this regard.
Next version (Opera 15?) was already Chromium based and is IMO not worth to install.