try this script: http://www.scriptspot.com/3ds-max/scripts/detriangulator hoefully it will clean your mesh to the extent that you can select the edgeloop
Drop On script which is part of miauu's Script Pack vol.2 allows spline projection(whole spline or part of it) on surface with an option to project the tangents of the knots.
I would look into Maxscript to solve this. You could look at this script as an example, and expand upon it if needed. http://www.scriptspot.com/3ds-max/scripts/max-defaults
I got this script working perfectly with the help of Miauu (http://miauumaxscript.blogspot.pt/) I will post it in a new thread along with other scripts that i use. Cheers guys!
Thanks for the script, i was searching the blueprints manager, so, first i need to crop all 4 images in photoshop, and use the script for importing in 3D max?