[If that's the only stumbling block, is it possible to manipulate ID to make it falsifiable?]
If ID is to become a falsible scientific theory, it first has to take a stand on some scientific points such as the age of the earth. So far, the IDists are unable (or unwilling) to make such a stand as they'd rather not offend their 'friends' in the YEC movement.
At the rate it's going, the overstuffed 'big tent' of ID might explode.