A friend's PC is very sluggish and contains a lot of photographs sent to him in emails from his family. I suggested putting all the photos on CDs,then deleting them from the PC, but when we tried that a message came up that the photos were ROM files and we couldn't send them to CD drive/disk. I've never encountered this before. Any advice, please? OS is Win XP & we were using XP's method to transfer to CD.