Personal dictionaries (TeXworks / Win7)

I am having trouble simply creating a personal dictionary for use with
TeXworks. I've read numerous posts online indicating that you should be
able to create a *.dic file in some subdirectory such as
AppData\Local\MikTex\2.9\TeXworks\0.4\dictionaries or
AppData\Roaming\MikTex\2.9\hunspell\dicts, but no matter what permutation
of those paths I use I can't seem to get TeXworks to recognize it. I've
also set the TW_DICPATH environment variable to no avail.

If I manually add words to the end of the en_US dictionary in C:\Program
Files\MikTex\hunspell\dicts, they get picked up just fine. But obviously
editing that dictionary isn't a good long-term solution, since it's likely
to get clobbered during upgrades.

Can anyone offer some advice?

-- 
Dane Powell
Graduate Student / Research Assistant
Rice University Mechatronics and Haptic Interfaces Lab
danepowell.com - mahilab.rice.edu
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