2) How is possible to quote texts and to view the last post to reply it?
3) Are there "smiles" to enable?
Take a peek at our Style Codes [webmasterworld.com], which show you how to do quotes and smilies.
You can only view the first post in a thread when you hit "reply" - this helps keep the topic on track.
4) Exists the possibility to set automatically an e-mail sending for each reply?
When you post in a thread, before you click "Submit," check the box next to the question "Do you want an email notification of replies?"
5)Is it normal that I'm not able to view some posts I've written to reply in threads? Does anyone cancel them for "editing" reasons?
It is possible that a post has been moved or removed by a moderator - when this happens we like to send you a stickymail telling you why (although sometimes we get busy and/or forgetful). If you have questions about a message in a particular forum, please contact that forum's moderator and he/she will be able to give you more specific info.