If you put those babies under the mamma... be sure it is totally dark night. (And remove all the other eggs.) Then get up early in the morning before dawn and be out there to watch to be sure she accepts them. If she doesn't, she will kill them.
I was going to do all that, but I do need a flashlight to see what I'm doing, right? Or should I do it by feel so the light isn't a problem?
I was also considering just putting two or three under her the first night to see how she does, and then put the rest under her the next night. Do you think that would be better than putting all eight under her in one go?