[ovirt-users] icons for custom defined OS

Hi, I defined additional operating systems in my oVirt 4.2.6 installation according to https://www.ovirt.org/develop/release-management/features/virt/os-info/. Now i want to have custom default icons for use in VM portal for these new OS definitions. How can i do this? I only found a way to change the icon as individual VM portal user, this is nice, but not exactly what i want. thx matthias