Criminal Restitution Improvement Act of 2006 - Amends federal criminal code restitution provisions to: (1) make restitution mandatory for federal crimes resulting in pecuniary loss to identifiable victims, including loss proximately resulting from such crimes; (2) expand the extent of such restitution to include the victim's cost of seeking and collecting restitution; (3) permit disclosure of presentence reports to victims of crime; (4) require courts to order immediate payment of restitution; (5) prohibit termination of probation for convicts with unsatisfied orders of restitution; (6) expand provisions ordering the forfeiture of profits from an offense to require the forfeiture of any profits made possible by the offense; and (7) expand the rights of victims of sexual offenses against children to recover civil damages.