Done! It wasn't as easy for me as Mr Jerzy wrote in his article... but, at least I finished Later I'll post some photos... but now how I did it:
The cork bought by me was in so big parts... that I had to place it like a puzzle One by one... it took some time, but I'm glad it's over Parts of cork was fixed with very strong glue and foam... And tied until the foam was inflexible.