flancter and timequest

Additional question to this:

if you have an entity, which you use to realize the cascade of two flip-flops. Say this entity is called many_ff,

and you use this entity in the design whenever you need to synchronize two clock domain signals,

is there any 'generic rule' for the timequest analyzer to say that whatever is on the input of this entity is false path to whatever is at the output of this entity? So far for each such instance of the entity I try to identify the signals there (in the timequest wizard) and generate single false path rule for this specific instance. Would be nice however if I could say only that many_ff is synchronizer and hence false path.....

thanks

d.