Themes / Skins

I posted something ages ago about skins/themes but didn't get any replies.

Is skinning or applying themes to the App Launcher possible without modifying the 'default' skins? I've searched and found very little other than using patheme files or a folder located in `PortableApps\PortableApps.com\Data\Themes` but that didn't work, I also tried the default directory for themes and that didn't work.

Can anyone point me in the right direction, or at least tell me if it's possible?