You could modify the CurrentTime placement in the skin to something like:
Code:
<CompositeImage name="CurrentTime" size="49,5">
<DrawRoundedRect loc="0.5,0.5" size="99,98" fillColor="Black" borderColor="Transparent" radius="2" borderWidth="0"/>
<DrawImage filename="..\weather2\current.png" loc="0,0" size="25,100" fixedAspectRatio="true" align="left"/>
<DrawText text="@currentTime" loc="25,0" size="75,100" textStyle="GeneralTextStyle" align="Center" valign="Center"/>
</CompositeImage>
And then just save the image to the same place each time (..\weather2\current.png in the example) Not sure how you would add the temp though. I also don't know how often sub reloads the images in the placements.