Actually, DOG, I have heard of ICAO Doc. 7192-D3 courses which run for a year and longer, however they may have additional content insisted upon by the state carriers. Royal Jordanian courses were/are 6 months I think Monther told me once. I think I am correct in saying the LH Ops officers course used to run for a year, if not longer. I'd be interested to hear from others here on that topic who have been through it.
If you are really going to cover the subject well, then 6 weeks for the FAA license I'd say pushes it- depending on any pre study and homework levels. I'd estimate that the Doc. 7192 syllabus in a full time classroom environment would take at least 3 months to cover the materials. It might be practical experience requirements might have been included in the years course.
Hope all's well with you by the way...