Remove all 2.0 pkgdefs in symbian4 and rename all 3.0 pkgdefs to package_definition.xml
<?xml version="1.0" encoding="UTF-8"?>
<SystemDefinition schema="3.0.0" xmlns:qt="http://www.nokia.com/qt">
<package id="homescreen" name="Home Screen Apps" levels="support task ss hs">
<collection id="homescreen_info" name="Home Screen Info" level="support">
<component id="homescreen_build" name="Homescreen Build">
<!-- break this up properly into components -->
<unit bldFile="." qt:proFile="homescreen.pro" qt:qmakeArgs="-r -config rom"/>
</component>
</collection>
<collection id="homescreen_test" name="Home Screen Test" level="support">
<component id="tsrc_build" name="Tsrc Build" filter="test,unit_test">
<unit bldFile="tsrc" qt:proFile="tsrc.pro" qt:qmakeArgs="-r MMP_RULES+=EXPORTUNFROZEN"/>
</component>
</collection>
<!-- fiill in details with broken up homescreen_build -->
<collection id="homescreenapp" name="Home Screen Application" level="hs">
<component id="hsutils" name="Home Screen Utils" introduced="^4"/>
<component id="hsdomainmodel" name="HS Domain Model" introduced="^4"/>
<component id="hs_runtimeplugins" name="HS Runtime Plugins" introduced="^4" class="plugin"/>
<component id="hs_serviceproviders" name="HS Service Providers" introduced="^4" class="plugin"/>
<component id="hs_stateplugins" name="HS State Plugins" introduced="^4" class="plugin"/>
<component id="hs_widgetplugins" name="HS Widget Plugins" introduced="^4" class="plugin"/>
<component id="hsapplication" name="Home Screen Application" introduced="^4"/>
<component id="hshomescreenclientplugin" name="Home Screen Client Plugin" introduced="^4" class="plugin"/>
<component id="hsmenucontentpublish" name="HS Menu Content Publish" introduced="^4"/>
</collection>
<collection id="screensaverapp" name="Screen Saver Application" level="ss">
<component id="snsrutils" name="Screen Saver Utils" introduced="^4"/>
<component id="snsr_serviceproviders" name="Screen Saver Service Providers" introduced="^4" class="plugin"/>
<component id="snsr_stateproviders" name="Screen Saver State Providers" introduced="^4" class="plugin"/>
<component id="snsr_runtimeproviders" name="Screen Saver Runtime Providers" introduced="^4" class="plugin"/>
<component id="snsrapplication" name="Screen Saver Application" introduced="^4"/>
<component id="screensaverproviders" name="Screen Saver Providers" introduced="^4" class="plugin"/>
</collection>
<collection id="taskswitcherapp" name="Task Switcher Application" level="task">
<component id="taskswitcherappecom" name="Task Switcher Application ECom" introduced="^4"/>
<component id="tsserviceplugin" name="Task Switcher Service Plugin" introduced="^4" class="plugin"/>
<component id="ts_runtimeplugins" name="TS Runtime Plugins" introduced="^4" class="plugin"/>
<component id="tsapplication" name="Task Switcher Application" introduced="^4"/>
</collection>
</package>
</SystemDefinition>