Mimetypes Madness

I’m trying to figure out how to create custom icons in XFCE, (for the home folder not desktop, for that you can just make a launcher) and been getting frustrated with mimetypes. I am able to create svg’s and change the default “Special” icons in the home folder, but cannot create new ones. Specifically the standards in /.config/user-dirs.dirs namely:

XDG_DESKTOP_DIR="$HOME/Desktop"
XDG_DOWNLOAD_DIR="$HOME/Downloads"
XDG_TEMPLATES_DIR="$HOME/Templates"
XDG_PUBLICSHARE_DIR="$HOME/Public"
XDG_DOCUMENTS_DIR="$HOME/Documents"
XDG_MUSIC_DIR="$HOME/Music"
XDG_PICTURES_DIR="$HOME/Pictures"
XDG_VIDEOS_DIR="$HOME/Videos"

I could create for example:

XDG_PLACES_DIR="$HOME/Places"

& the corresponding .svg file, but this does nothing. I’ve already slightly messed up the system with Assogiate. What I need to do is either create new folders for /.config/user-dirs.dirs, (or whatever file generates it) or create duplicate mimetypes for inode/directory. Any ideas? Thanks.