Example XML to force DWG/DXF associations

<Collection clsid="{53B533F5-224C-47e3-B01B-CA3B3F3FF4BF}" name="HKEY_CLASSES_ROOT"><Collection clsid="{53B533F5-224C-47e3-B01B-CA3B3F3FF4BF}" name="Applications"><Collection clsid="{53B533F5-224C-47e3-B01B-CA3B3F3FF4BF}" name="EModelViewer.exe"><Registry clsid="{9CD4B2F4-923D-47f5-A062-E897DD1DAD50}" name="EModelViewer.exe" image="2" descr="Wizard Generated Registry Item" status="EModelViewer.exe"><Properties action="U" hive="HKEY_CLASSES_ROOT" key="Applications\EModelViewer.exe" type="" name="" value=""/></Registry>
            <Registry clsid="{9CD4B2F4-923D-47f5-A062-E897DD1DAD50}" name="(Default)" descr="Wizard Generated Registry Item" image="7"><Properties action="U" hive="HKEY_CLASSES_ROOT" key="Applications\EModelViewer.exe" name="" default="1" type="REG_SZ" displayDecimal="0" value=""/></Registry>
            <Collection clsid="{53B533F5-224C-47e3-B01B-CA3B3F3FF4BF}" name="shell"><Registry clsid="{9CD4B2F4-923D-47f5-A062-E897DD1DAD50}" name="shell" image="2" descr="Wizard Generated Registry Item" status="shell"><Properties action="U" hive="HKEY_CLASSES_ROOT" key="Applications\EModelViewer.exe\shell" type="" name="" value=""/></Registry>
                <Registry clsid="{9CD4B2F4-923D-47f5-A062-E897DD1DAD50}" name="(Default)" descr="Wizard Generated Registry Item" image="7"><Properties action="U" hive="HKEY_CLASSES_ROOT" key="Applications\EModelViewer.exe\shell" name="" default="1" type="REG_SZ" displayDecimal="0" value=""/></Registry>
                <Collection clsid="{53B533F5-224C-47e3-B01B-CA3B3F3FF4BF}" name="open"><Registry clsid="{9CD4B2F4-923D-47f5-A062-E897DD1DAD50}" name="open" image="2" descr="Wizard Generated Registry Item" status="open"><Properties action="U" hive="HKEY_CLASSES_ROOT" key="Applications\EModelViewer.exe\shell\open" type="" name="" value=""/></Registry>
                    <Registry clsid="{9CD4B2F4-923D-47f5-A062-E897DD1DAD50}" name="(Default)" descr="Wizard Generated Registry Item" image="7"><Properties action="U" hive="HKEY_CLASSES_ROOT" key="Applications\EModelViewer.exe\shell\open" name="" default="1" type="REG_SZ" displayDecimal="0" value=""/></Registry>
                    <Collection clsid="{53B533F5-224C-47e3-B01B-CA3B3F3FF4BF}" name="command"><Registry clsid="{9CD4B2F4-923D-47f5-A062-E897DD1DAD50}" name="command" image="2" descr="Wizard Generated Registry Item" status="command"><Properties action="U" hive="HKEY_CLASSES_ROOT" key="Applications\EModelViewer.exe\shell\open\command" type="" name="" value=""/></Registry>
                        <Registry clsid="{9CD4B2F4-923D-47f5-A062-E897DD1DAD50}" name="(Default)" descr="Wizard Generated Registry Item" image="7"><Properties action="U" hive="HKEY_CLASSES_ROOT" key="Applications\EModelViewer.exe\shell\open\command" name="" default="1" type="REG_SZ" displayDecimal="0" value="&quot;C:\Program Files\Common Files\eDrawings2014\EModelViewer.exe&quot; &quot;%1&quot;"/></Registry>
                    </Collection>
                </Collection>
            </Collection>
        </Collection>
    </Collection>
</Collection>