Assuming your Plone Site is in 192.168.45.131
and you have following entry in your hosts file:
192.168.45.131 192.168.45.131-unthemed
Create a Plone Site (e.g. "Plone")
http://192.168.45.131:8080/Plone/portal_quickinstaller/manage_installProductsForm
[x] Collective Skin Switcher 3.1
[x] Diazo theme support 1.1.1
[Install]
http://192.168.45.131:8080/Plone/portal_properties/editskin_switcher/manage_propertiesForm
edit_skin=Sunburst Theme
switch_skin_action=based on specific domains
specific_domains=http://192.168.45.131-unthemed:8080
http://192.168.45.131:8080/Plone/@@theming-controlpanel
(Create and) activate a diazo_theme
http://192.168.45.131:8080/Plone/++theme++diazo_theme/@@theming-controlpanel-mapper
add the following to rules.xml
<after css:theme-children="body" css:content-children="body" />
[Save File]
http://192.168.45.131:8080/Plone/@@theming-controlpanel
Advanced settings
Unthemed host names=192.168.45.131-unthemed
Theme base=(Unstyled)
[ ] Use popup overlays for simple forms
# this also disables/enables popup overlays on unthemed host names
http://192.168.45.131:8080/Plone
will show your diazo theme
http://192.168.45.131-unthemed:8080/Plone
will show Plone's Sunburst Theme