Sorry beforehand if this is not in the right sub forum but I did not see one for custom games.
Please add the Infection gametype for custom games. The options for Flood do not allow players to use their own appearance, but are stuck with the bright yellow for survivors, and the flood skin for the flood. It is very inconvenient when trying to create a more classic infection experience. Also starting infected needs to be based on a percentage. Have a nice day and I hope everyone else is enjoying Halo 4 as much as I am.