Well, at least now the upgrade seems to have been completed successfully :-)
Most of the problems were because of a flaky FTP connection, though.
I'd to babysit it so it would trasfer all the files.
And then I copied the files to the wrong directory and sc`rewed it all over again ;-) Anyway, I know now that I can have a CMS as the root of my site. I don't have any time left now, so I'll finish it later.
Anyway, to save you the gory details, I screwed up and the server was down, sorry.
It should be working now.