i finally found the solution for the problem.
I realized the new 1.1 was setup in italian (my PB's main language is italian) but i switched this to english on 1.01, because i wanted the "email me" and "made on a mac" icons appear in english in the site, once published.
For some reason when I installed 1.1, he switched back again to italian, but this created a conflict, in fact i could not even open the Help" in iWeb.
I went to iWeb icon in application, right clicked and opened info, and then i un-thicked all the languages except english (and i realized the were two "italian" thick boxes, hence the conflict).
I can now open the 1.0 templates, as well as the Help.
I didn't publish, yet, as I have to finish the update, so not sure now everything works fine (i saw a lot of noise in the forum on the 1.1 update) but as least i solved this problem!
I hope this might be useful sor someone else too.
gianluca
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http://www.gianlucamarucci.com