Additionally, any training that you get overseas from an instructor qualified in that country can also be credited towards an FAA licence.
Though not if it requires an endorsement in the logbook. Only an FAA CFI can endorse a logbook. For the CPL you need an endorsement stating you have covered all the areas of training and that you are ready for the practical test.
Your hours count 100% towards the FAA CPL. The only things to watch are the FAA requirements - like 2 hr day VFR cross country, 2 hr night VFR cross country (I think), 300nm cross country, cross country definition of 50nm etc.....