If he has 61388, hes already as updated as he can get, Game Build wise anyway, without getting into T:ANE stuff.
If ALL of your JR products aren't working, make sure you have the latest Trainz FX & Sound Libraries from their site. Those are the two most common things that will throw most people's JR items out of whack.
After that, if all you have are engines make sure you have the latest Cabs for them as well.
Falcus