Delete ADX files from a CDI image

[cheatengine]

I'm tyring to remove the background music from a game using PowerISO and have finally found the ADX files that need to be removed!

But now i don't know how to remove them and recreate the CDI without them.
I'm using PowerISO which only allows me to copy and duplicate but not delete or alter.
I had to mount the image in order to obtain these files.
Any suggestions?

I could really use some help here. ;)

Thanks