Can one erase saved files from rewritable CD using Nero start-smart essentials?

I have two small pdf files saved in a 700Mb rewritable CD. I need to erase these files and use the entire space for some other purpose. Ca anybody please tell me how to erase these files from the rewritable CD using Nero start smart essentials or Nero express essentials. Thanks.|||yes, you can erase rewritable cd using nero. open the nero and go to extra menu. there you can find the option for erasing rewritable cd.|||First thing is to put the cd in the rewritable drive the pc knows the different media types open my computer and right mouse button click on the rwdisc icon and a menu opens up one should say format disc so format it to blank and add the files you want again ....goodluck|||ya we can delete it without much difficulty by simply deleting it..............