Mirroring an imported part?

Ok I tried to do a search, but didn't come up with anythingthat might pertain to my problem. I have an iges file of a partthat after painstakingly getting it through the import diagnosis, Ineed to mirror it to represent the left hand part. The problem isthat I have is that the part is not complete basically I have thesurfaces as solid bodies, and just sketches that represent theoutline of the part. When I select all of it and insert mirrorpart, it mirrors the solid body correctly but, the sketch which Ialso need mirrored it just comes in normal. Please help as this iscausing me to pull out my hair!SolidworksGeneral