There is no way around this that I know of. I have an R200 just for the CD/DVD printing facility and when one of the inks is empty, or rather when the printer tells you it's empty, you have to renew the one in question in order to carry on printing. The idea around this is to allegedly prevent the nozzle(s) which are fed from the spent cartridge from drying up and clogging and potentially costing you a lot of money. Some say that changing the settings in the preferences to print black only would work. Sadly it doesn't as that option isn't available in the Control Panel. Same with grey scale printing but grey needs the availability of other inks to 'make' grey.
I always have on hand a pack of reserve cartridges should this happen.