Hi NightCabbage,

1) .lwo is the best format for modo, using ngones, and you can turn 'weld vertices along edges' on.
2) Styles are converted into surfaces names
3) Don't forget to give some objects name in Moi, every geometry with the same name = 1 object (layer) in modo.

About the normal orientation, you can try to only use solids, so MoI will align normals 'correclty'. For open surface, you have 50% to have inverted normals. A double sided surface will be assigned into modo anyway.

You can try to reflip normals by hand in modo (select a poly -> flip), but expect if it was fixed, (havn't test it in the new service pack), the vertex normal will be wrong.