IF, they are still alive and pushing, but having problems break through you MIGHT be able to pip a tiny hole in the shell and TRY to open the membrane enough so their beaks are clear to breath. It would be a LONG slow process, wetting the membrane with a qtip, working through a tiny hole. The smaller the better so not to dry things out inside more than nessasary.
I have seen a number of people try and help a hatchling, only to fully open an egg, or open it too wide and then the hatchling(s) dry out, can't absorb the yolk and fail to thrive. It's a tough call for sure.
Its Friday though and I will be around most of the evening and I am sure Pete will be as well. They are 5 or 6 hours ahead of me time zone wise. We are eastern standard here so it's 5pm for me, I believe Pete is now 10pm.