First real go at grasshopper.

Hello,

As the title states, this is my first real go at grasshopper. I've had a short introduction course in school about this plugin but nothing major or complicated. 

What am I trying to do?
Well I am trying to build a vault, but the shape of the vault comes from an other plugin called: RhinoVault. It gives me a mesh of the vault it comes up with. As I want to actually build that vault, I was wondering if I could overlay the mesh with the shape of a brick and let grasshopper determine the best possible pattern, or let me atleast try some other patterns easily.

I have been trying to load the mesh into grasshopper and it gives me a few problems right of the bat. It consists out of serveral surfaces, so when I try to devide the surface, it divides them all seperatly, wich is not what I wanted. 

I have been searching for a solution for a while now, but I'm very new to grasshopper and most of the time I'm not even sure what I should search for. So hence this discussion.

I hope that someone wants to help me out, by pointing me in the right direction. 

I added a few pics and a file (dont know if the file will show anything, if so, I seperated the components that the plugin spits out, thats why it looks a bit chaotic).

Thank you all in advance!