Frenzie you're my master!
I will start experiment with one by one solutions you gave me and I'll be back with the results!
Finally, I think changing my epubs is not so much of work to do. In every of them I gave a <calibre7> ... var and I think the "replace as" do the trick almost automatic! (at least in Calibre... If I'll change anything in Sigil, I will lost my TOC's...

)
Thank you very much!!!!

