1) I understand the concept of "abstraction", but when i use them in my patchs they don't work. Even with abstraction and patch saved into the same directory...what i'm missing?

Hi Cristiano, could you be more specific about what doesn't work?  For example, does the object not create?  Have you created them with inlets and outlets, etc?

2) In sampling with "soundfiler" object, i cannot acess my samples, even adressing their directories in "startup" and "paths", what's missing?

Again, what errors are you getting?  It sounds like you are trying to setup a sample directory with the paths option... someone more experienced than me will have to chime in on whether this works.  I always provide the full path (for example, from an [openpanel] object).  If you could copy and paste what you see from the main window (where errors and other info are printed) it would help.

Kevin