Hiiclient does not have that feature as of yet and one of the reasons I still use the HII toolkit.
I placed and enhancement in the forums, you can vote on it and one day it might come true
Thanks for pointing me to the thread. (I swear - I did search the forums before posting. I'll need to sharpen up my search skills I guess.)
For anyone who landed here looking for the solution - I'm marking this question "Answered" and I've added my vote to the thread that EMiranda referenced. I'd recommend you look at that thread to see some suggested workarounds for this issue, and also to monitor LANDesk's response to the feature request.