@rion If they are major platforms that are related to consoles or home computers I will consider it. But I do have a lot of requests to add obscure "homebrew" and or / sub-platforms that I do not wish to support as they are often either too obscure or already supported by "arcade" or others.
Mainly Skyscraper was made to support the RetroPie naming scheme and platforms. I have, however, added some platforms besides that that I felt made sense. I am quite restricting when it comes to adding more, as I don't want to bloat Skyscraper too much.
But if you have a couple of platforms that you feel could fall under the RetroPie umbrella, I'd need the same info as found on the RetroPie supported platform pages, which is:
Platform name and shortname (eg. "Nintendo Entertainment System" / "nes")
File extensions (*.this, *.that)
But no promises I'll add them. :)