Ok, it seems that I have managed to finish upgrading to WP2. My theme was not working because I have removed gallery plugin and I had function call to this plugin from the header so it was not loading. I have also removed many other plugins like weather forecast, textile and other stuff which I was not using or which I obsolete with the new W2 (like editor).
All important plugins that I need a working fine with the new WP, including tags, threaded comments, comment quick tags, adsense-delux and others.
If you notice any misbehavior of the blog, please let me know, but I hope that things will go fine and that I will not have any problems (kinda dream after any updates :-] )
Since my server is fine now as well, I hope that the site will be up all time and that I will manage to find time to leave posts here. You won\’t believe how much I was missing the blog for all the time it was offline.