I'd like to see all of them in the Shameless collection!
By the way, you have some titles wrong.
Fulci's
Una Lucertola Con La Pelle Di Donna English title is
A Lizard in a Woman's Skin. Martino's
Tuti I Colori Dei Buio is
All The Colors of The Dark (or
They're Coming to Get You).
As other have mentioned your DVD player is probably already a multi-zone. You just have to find the code.
For your computer, you can use DVD-X or RioDVD. Both are region free.
http://www.rio-dvd.com/ http://www.dvd-x-player.com/