is there program to add or edit files with make any damage to iso file or image file?

ULTRAISO!!!

Personally I like it the best.

Although you cannot save images that are like over 300megs without a registered version...

ooops I forgot the link ---> http://www.ezbsystems.com/ultraiso/

thanks,will be add files or edit them without got corrupt?I want test some image files without compress again and again,files are too big like around 20 GB.

well, first of all you need to make a backup of the ISO you're modifying cause anything can go wrong.

second, 20GB?? What format ISO will you use? afaik there are no formats that support 20 GB. blu-ray and HD-dvd are new and they may support such images... but i don't think any iso editor does 20 gb right now.

not iso it self ,I have data over 15 GB but when compress will image size 900 MB but it take ever long time to finish,that why need ISO modifier.