Dread Necromancer and Corpsegrafter feat

[Lopke_Quasath]

Does the Dread Necromancer's undead stat boosting abillity (sorry, don't have my book at work), the one boosting his created undead by +4 Str and +2 hp per HD, stack with the Corpsegrafter feat?

Cheers

 

[Victim]

The HP stack, but the stat bonuses don't since they're all enhancement bonuses.

 

[Lopke_Quasath]

Perfect, thank you