What if I'd want to use say the VxAce RTP and someone else already upscaled it for me. An example would be this VxAce icon setfrom Yanfly:
http://yanfly.moe/2015/10/23/freebies-mv-ready-ace-icons/
Would I be able to use them or do I have to do all the hard work myself? I'm specifically curious about this icon set.