Assign splines into 1 line.

Hey. I have a question about splines in 3ds max. Basically I have a shape made out of splines. and I need to make them all in 1 line. Like on same level. Here is picture of all shape points selected.

See those red points? I was trying to align them into 1 line with just move tool. But that totally sucks. So is there a way to align those in 1 line?

Thanks.