I browsed the manual + forum, but i wasn't able to find any function, method or workaround for making a perfect copy of an entity.
Is it possible this? I would use that, really.

what do you mean by perfetct?
please explain exactly why you want it.

The new copy inherits all the attributes, functions, skins, etc. with other words everything from its predecessor. Perfectly.

it looks like you need some thing like:

ent_clone();

The manual doesn't write this function duplicates the entity.
Will be good to do that for?
What/Where will be the pointer of the new entity?

OK then,why you don't ent_creat() the new entity and assign the old entiy's function to it?

You are not looking for ent_clone. ent_clone allocates new memory for the mesh (and skin) so you can manipulate it without affecting all other instances of the same file.

I don't think there is an instruction that does what you are trying to do, but you can code it yourself of course. Don't think too complicated, f.i. you could set some skill to a specified value that indicates its action (then there is ent_for_filename or how it is called, ent_create,...).

You know, i have my own solution.
I create the entity, set its attributes etc.
Later, when it needs, i create a new one, with loading from disk again and set everything again.
And, i change those attributes what i need.

But i am searching for an elegant way to do this process.
Perhaps no loading again from disk, no copying all the attributes and so on...

As you want to have two unique objects with the same attributes, there is always going to be some process of copying.
When you use ent_create and the entity is already in your level, ent_create does not load from hard disk.

Beret, ent_clone is needed, but it doesnt actually DO the cloning process.

Aku,
there is no built-in function for duplicating an entity, you'll need to write your own.
This SHOULD do the job though... (Untested Lite-C, Im typing out of my head here... I cant help with c-script though.)