Being an old web cam modder for uses in astronomy from way back....
I was interested when I saw this thread...
I did a quick Google and came across this step by step modding of the QC9K
I hope this helps you as the guy shows how to completely remove the existing USB cable for a longer one...
http://ghonis2.ho8.com/Pro9000mod.html
Hope this gets you up and running.
Looks like quite a nice little cam.
Rich