im pretty sure it will only work with verts. i did this a while back. i had to download a script off of highend called rivet or polyvertexconstraint. what it did, was constrain a locator to a vertex. from there, you could point and orient constrain a joint to a locator, then bake that down. then re-weight your object using…
but locators cant constrain to compnents, only to objects. Are you sure its locators and not something else? edit: Now that I have found the script you mentioned I understand. This might work! edit #2: Worked perfectly! -R