Easily add/remove room types by making the changes in Booking.com Extranet and then notify BookingCenter of the changes.
To Add or Remove a Room Type
See Booking.com Extranet FAQ http://www.booking.com/faq.html
How do I change Property Information, Images, Room Type Descriptions and Amenities?
All changes to Property and Room Type information such as descriptions, images, amenities, etc. are made in the Expedia Partner Central extranet. You have complete control over this in your Extranet. If you need help with making these changes, please contact your Expedia Market Manager. Remember, BookingCenter sends ONLY Availability, Rates and Restrictions to your Expedia Extranet.