I've realized a html/css based tool to test M3 Sakura skins with web browsers.
You can download it here.
To use it, simply copy the files of your skin in skinfiles/ folder and open one of the html pages.
More details on reatme.txt.
Edit:
Here's a version with default pink skin source files...
I like that games can be fixed after the fact, hate that it's being abused via beta tests... And DLC... I was a 7800 owner back in the day and loved Impossible Mission, turns out I couldn't beat it because it was actually impossible lol