So, in Life of Vista, I've only used...
code:
<Restrictions>
<SkinOptions>
<OptionSet>
<MultiVal Name="ratio">vertical</MultiVal>
</OptionSet>
</SkinOptions>
</Restrictions>
to indicate for a certain thing to show, but no mix-and-matching. To make it mix-and-match, I read the documentation, and I've used the <Conditions> tags, like
code:
<Restrictions>
<SkinOptions>
<OptionSet>
<Conditions>mode = "5112" AND ratio = "horizontal"</Conditions>
</OptionSet>
</SkinOptions>
</Restrictions>
...and it's not working...