HELP ASAP!! Making a copy of a backup.

Okay here is the situation. I've got a backup self boot DC game stored on a 700mb CD and I wanna make a copy of it. I tried copying it onto another 700mb CD on my friends burner which i think is using Nero for burn software. It didnt work. What do I need to make it work ie. any of the downloads on this site. Can anyone tell me what 2 do or direct me 2 something on this site that will help me?

If it's just a simple process. Can some1 guide me thru it step by step as my friend and I are new to copying/backuping CD's.

[xena]

1) Use discjuggler to cdreate the cdi image from the cdr first,in discjuggler menu mselect cdplayer to cdimage

2) In discjuggler menu select cd image to cd.
In the source field, click the icon on the left to browse your HD for the location of the .cdi file.
Once you have found it, click on it and hit ok. Back in DJ, under the source box, there should be some information telling you how much time in minutes the cdi image will take up on the cd.
The time should be anywhere between 72 and 74 min.