AutoRay will automatically span studies onto multiple discs if they are too large to fit on just one.
If your patient's studies are very large, it might take a while to burn using only CD's. This is because the study will span onto as many CD's as needed, which could be 5-10 CD's depending on the amount of data being burned. If you plan on burning large studies, you should consider switching to DVD's. If you have an Epson PP-100, you have the option of using both CD's and DVD's simultaneously. To switch to DVD's, follow the guide Here.