Hey guys thanks for all your help on this its much appreciated but i fixed this problem some time back

It had nothing to do with xiso format i basicly done this.
extracted the emulator rar to the desktop
went into my extracted folder and found the roms folder for my roms, copied all the files and folders with the default xbe and draged them into nero.
Setings for nero
DVD-UDF
Virtual partition
check xbox compatibility
burn at 4x speed
That was it, the emulators work fine now and run like a dream.
I think my mistake was not having the xbe in the root directory
