Hu,
You will want to save these files also.
Mill2000 pro:
Austools.ini
setting.ini (as mentioned)
ncc-inch.bin (this is the tool bin)
ncc-mm.bin (metric tool bin)
These save things like screen setting, toolbar location and setup, color setup(if you changed the colors), nc tool customization(in the tool bin), ect.
As you said in XP the /setting/ user/default (or your name) will get the job done here.
I posted these in a onecnc post,the one that got axed a while back.
I e-mailed support to find out how we save our tool bin setting in XP. I lost my setting last time I installed update.
I'll post what I find out.