If you unpack Icons.pak, I believe the ones you are looking for are in the file ".\Public\Shared\Assets\Textures\Icons\Generated_2bd9bdbe-22ae-4aa2-9c93-205880fc6564_Icons.dds" Are you planning to edit by hand or re-generate them using a modified Photobooth?

DOS2 Mods: Happily Emmie After and The Noisy Crypt

Steam Workshop
Nexus Mods