IPSEC Over PCC or Nth

Does anyone know if it is possible to run IPSEC over PCC or Nth?

it is with ppc and nth, not over, as ppc and nth are not tunnels.

it can be a bit tricky as there are (afaik maybe i am mistaken) 2 connections when you establish IPsec tunnel, and you have to make sure, that both of them goes the same way.

Hello!

Will that allow to load balance an IPSec VPN among 2 or more internet conections?