surface to scan data

[kenppy]

I have an imported facet feature of car body scanned data. What is the easiest way to throw a surface on this for me to use as a trimming surface to cut and make a flange for say a wheelarch 'A' surf that penetrates this surface?

thanks

View attachment 5820

 

[solidworm]

This thread must be helpful:
http://www.mcadcentral.com/proe/forum/forum_posts.asp?
TID=42730