Fusing two hairstyles in Fallout 3

[ZyaKen]

Hello. I've been working with NifSkope for nearly a year. And I've managed to make some really awesome cloths for ( Children of The Waste). For my Character. Though. There are two hairstyles I would like to fuse, together. Though unfortunately every video or written information, is in an understanding I can't comprehend. What I would like to know, is what exactly is it I do? To merge these two hairstyles. And what choice in the right click block, would be the appropriate way to add the pasted NiNode as a child.