When you export to DWG we are creating solids in 3D space so the view type that you are looking for is a view style setting in AutoCAD. I have no idea if Drafsight will allow you to do this as it is an AutoCAD knockoff.
If you try out AutoCAD 2012 there are purpose built tools to create hidden line remove drawings of 3D models. AutoCAD even includes a Catia translator to read in 3D models and produce drawing views that might do most of what you want, with the exception of the PMI of course.
Please send me a direct message with your contact information, I'd like to understand more what you are trying to do and see if there are ways we can help.
15" Macbook Pro Retina - OSX 10.9 in Portland, Oregon