Bonechips:
The new Structured Keywords (SK) dialog contains the full IPTC hierarchies for IPTC Subject, IPTC Scene, and IPTC Genre as part of the default set of keywords that I provided to Kirk as a sample of the Controlled Vocabulary Keyword Catalog (CVKC). You can use the SK to located the appropriate code and then copy and paste into the specified field. For the shorter ones, you might want to manually enter those if you are using them on a regular basis.
If there is enough interest, I'm sure Kirk would consider adding a few more options to the SK "Apply To: pull-down menu so that these specific IPTC fields can be managed from the SK dialog. Right now you can apply the collection of keywords to the Keyword or Caption field, but I don't believe there is any reason that more can't be added.
The full IPTC newscodes can be located (in several languages, BTW) at:
http://www.newscodes.org/ Hope that helps.
David