Bear with me, this is a little long winded but it should work.

1) Import the IGES file into " FreeCAD " (Free from http://sourceforge.net/projects/free-cad/) and export as STL .

2) Imort STL into " Blender " (Free from http://www.blender.org/) and export as DAE .

3) Import DAE into " Sketchup Pro ...

This is my first post here so, hi! I thought this would make a good intro:
The photo is a bit old, I now have a Kindle Fire HD sorting out the tunes, in place of the retired laptop.
And yes, that is an old door, I rescued it from the garage.