If you mean that your .dmrc was ignore here, then I am puzzled. Just because
someone did not respond does not mean it was ignored. Likely nobody had
encountered it. In such cases, it is best to check out a variety of sources,
such as LinuxQuestions.org or ubuntuforums.org. I know site managers discourage
cross-posting, but there are sometimes good reasons to do so. No one site is a
bottomless repository of knowledge.

To fix the icons on your Desktop, press ALT+F2 and in the dialog box type:
gconf-editor
Then click "Run".

Then navigate on the left to Apps --> Nautilus --> Desktop and
you will find an option called "volumes_visible". Switch that off by right
clicking and editing it. You can also edit icons for Computer, Home, Network and
Trash. The changes will take effect immediately.