In case it is relevant, the required icon is a
shortcut to Evince on
TDE 3.5.13 on Debian Squeeze.
Right-click on the desktop, select Create New... > Link to Application
from the context menu, and enter the command in the appropriate
box in the Application tab in the resulting dialogue. (If it doesn't
work the first time, you many need the full path to the application
and/or to fill out the Working Directory box as well.) Then configure
the name and icon for the desktop entry in the General tab.
I have landed up with a very peculiar icon, but it works! That you very
much.