pls help on radios fs2002

Using default fs2002 panels on 3rd party aircraft has the annoying inconvenience that nav2 doesn't work at all and changing frequencies is allowed only on the active and not on the stby as in the default panel loaded with deafult aircraft. Editing aircraft.cfg file with the appropiate lines for the radios (eg: Nav.2=1, 1, 0 etc) doesn't change anything, nor copying the complete panel directory into the 3rd party aircraft directory. Also using some 3rd party panels with ad hoc guages is frustrating: many radios cannot be tuned at all...Someone can help me ? Thanks.