Inside you will find the first rar file with the main folder of the entire scene, you just have to extract the other rar. files (textures etc) and put them in the main folder. Once Maya is open, set the scene and help yourself with the path editor to set all the textures as they should be. Same for the XGEN, or Maya will not read it.
I also uploaded the rar files with all the OBJ's, Zbrush and Substance scenes.
In the Maya scene you will find everything you need to make a render of the character just as you see it, also, there are two GRP's, one is called head_coordinates this one has the coordinates that you need to copy paste in the channel box of the OBJ (head) that you extract from the Zbrush scene of the head. The other one called GRP curves has inside the curves created through the xgen guides of the character.
for any problem you can contact me.