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Importing Multiple meshes into ZBrush 4 from Maya

Hi, I have a Head model that is textured and 2 other poly spheres for eyeballs. I am having trouble importing them into ZBrush from maya. Can somone please help me with bringing these meshes from maya back to Zbrush (the UVs are laid out ect.) Any help would be great, I have been messing with this for a few hours!
Thanks