I know it's been a long time since anyone posted but this post may be relevant to a question I just asked here...
Looking at the HID.cpp I can only see 'get' (assume the convention of get data and set data) but no 'set'.
I best read HID1.11, will come back when I have a better understanding of how it works...
Mike
Updated: I found a solution to my problem thanks to Pagus, check out the HID-Project...