Mapping a block to a surface

Hi there,

I am trying to map an object to a surface in Grasshopper but the object is made up of several components and imported from Rhino which means the script I managed to produce would map only for one component at a time, as in the image below.

Does anyone have an idea of how I could map the whole object on the surface? I tried importing it as a block but an error comes up.

Any help would be much appreciated!

Regards,

Irina