>Does anyone know about existence of a program allowing to copy all files which belong to a certain project into separate directory.
Sergey is correct as usual, but here I'ld opt for a non OOP-way:

use my.pjx
scan
   ? name
endscan

does about the same and will work on 2.x either.
Not a bad idea if legacy work/upgrading has to be done.

my 0.02 EUR

thomas